Shellshock is a security bug in Bash (Bourne Again SHell) command-line interpreter, mostly known as shell. Linux expert Stéphane Chazelas revealed this bug on 24th September 2014, and it is more severe than Heartbleed bug.
Delivered a 10-15 minute presentation and Q&A session with co-presenters Rula Danno and Darren Rolfe in January 2015 for the Introduction to Computer Security (EECS 3482) course at York University, Canada, about the software vulnerability in the Bash command interpreter, dubbed Shellshock, that was discovered in September 2014.
http://www.eecs.yorku.ca/course_archive/2014-15/W/3482/
I prepared it when i started learning linux at KBFS. It explains why linux is less prone to virus and what kind of viruses affect linux. (final edit pending)
Telehack: May the Command Line Live ForeverGregory Hanis
Want to play a game? I bet I can root more boxes than you and stop you from gaining control. Telehack is a simulation of a stylized arpanet/usenet, circa 1985-1990. It is a full multi-user simulation, including 25,000 hosts and BBS’s the early net, thousands of files from the era, a collection of adventure and IF games, a working BASIC interpreter with a library of programs to run, simulated historical users, and more.
Ross Bevington, Microsoft
In ‘The Matrix’ sentient machines subdue the population by developing a highly sophisticated simulation. High interaction honeypots are a lot like The Matrix, designed to convince an attacker to execute an attack so we can monitor them. But these honeypots are flawed!
Attackers are continually adapting in order to evade our defenses - meaning that it’s often not enough to just set up a honeypot and watch the results roll in. Is a new approach better?
Did you know that 40% of IaaS VMs in Azure are Linux? For Microsoft to protect itself and its customers Linux is a priority.
At MSTIC we’ve developed a new type of Linux honeypot that allows us to deceive and control the behavior of an attacker. We are using this to understand the person behind the attack, examining them as they examine us. Using these techniques, we are able to better track the person behind the threat, build better protections and ultimately protect more Linux users - whether they are using Azure or not.
In this presentation I’ll show some of the successes of running a Matrix like environment, failures where a glitch was spotted as well as deception approaches that could be applied to other domains. Finally I’ll show how easy it is to leverage Azure’s big data capabilities to build and ultimately query all this data at scale as well as how you can immediately reap the benefits of this work by connecting your Linux box to Azure Security Center.
Delivered a 10-15 minute presentation and Q&A session with co-presenters Rula Danno and Darren Rolfe in January 2015 for the Introduction to Computer Security (EECS 3482) course at York University, Canada, about the software vulnerability in the Bash command interpreter, dubbed Shellshock, that was discovered in September 2014.
http://www.eecs.yorku.ca/course_archive/2014-15/W/3482/
I prepared it when i started learning linux at KBFS. It explains why linux is less prone to virus and what kind of viruses affect linux. (final edit pending)
Telehack: May the Command Line Live ForeverGregory Hanis
Want to play a game? I bet I can root more boxes than you and stop you from gaining control. Telehack is a simulation of a stylized arpanet/usenet, circa 1985-1990. It is a full multi-user simulation, including 25,000 hosts and BBS’s the early net, thousands of files from the era, a collection of adventure and IF games, a working BASIC interpreter with a library of programs to run, simulated historical users, and more.
Ross Bevington, Microsoft
In ‘The Matrix’ sentient machines subdue the population by developing a highly sophisticated simulation. High interaction honeypots are a lot like The Matrix, designed to convince an attacker to execute an attack so we can monitor them. But these honeypots are flawed!
Attackers are continually adapting in order to evade our defenses - meaning that it’s often not enough to just set up a honeypot and watch the results roll in. Is a new approach better?
Did you know that 40% of IaaS VMs in Azure are Linux? For Microsoft to protect itself and its customers Linux is a priority.
At MSTIC we’ve developed a new type of Linux honeypot that allows us to deceive and control the behavior of an attacker. We are using this to understand the person behind the attack, examining them as they examine us. Using these techniques, we are able to better track the person behind the threat, build better protections and ultimately protect more Linux users - whether they are using Azure or not.
In this presentation I’ll show some of the successes of running a Matrix like environment, failures where a glitch was spotted as well as deception approaches that could be applied to other domains. Finally I’ll show how easy it is to leverage Azure’s big data capabilities to build and ultimately query all this data at scale as well as how you can immediately reap the benefits of this work by connecting your Linux box to Azure Security Center.
Алексей Старов - Как проводить киберраследования?HackIT Ukraine
«Cybercrime» является особым направлением в области компьютерной безопасности и приватности. Это направление объединяет научные работы, которые исследуют различные сценарии атак или мошенничества, анализируют вредоносные экосистемы, обнаруживают злоумышленников и изучает их методы с целью разработки эффективных мер противодействия. В текущем докладе будут предоставлены рекомендации о том, как проводить киберрасследования, основываясь на примерах из наших работ и статей. Например, я расскажу о нашем масштабном исследовании вредоносных веб-оболочек и как мы смогли обнаружить жертв и нападающих по всему земному шару, а так же о том, как мы использовали навыки социальной инженерии, чтобы исследовать экосистему мошеннической технической поддержки, и многое другое. Моя цель состоит в том, чтобы заинтересовать научных исследователей и других представителей области ИБ в работе по направлению “Cybercrime”, в поиске различных путей предотвращения и расследования киберпреступлений. А также, показать, что подобные полезные исследования не всегда требует огромных ресурсов и сотрудничеств. Формат доклада: разговор в виде легкого семинара с элементами коллективного мозгового штурма (ноутбук не требуется). Мы рассмотрим 3 урока, из каждого выделяя полезные методы, инструменты и навыки. Язык: русский (с элементами английского).
Serão demonstradas diversas técnicas de ataque, tais como: Injeções de codigos,brute force, backdoors, root kits, exploits e várias outras maneiras para acessar e se manter indevidamente a servidores,em contra-partida são discutidas melhores praticas para se
evitar os tipos de ataques citados. (Palestra realizada no 3º Festival de Software livre em belo horizonte - FSLBH)
Owning computers without shell access 2Royce Davis
These are the slides from my talk at BSides Puerto Rico 2013. I will post a link to the slides later.
Abstract:
For many years Penetration Testers have relied on gaining shell access to remote systems in order to take ownership of network resources and enterprise owned assets. AntiVirus (AV) companies are becoming increasingly more aware of shell signatures and are therefore making it more and more difficult to compromise remote hosts. The current industry mentality seams to believe the answer is stealthier payloads and super complex obfuscation techniques. I believe a more effective answer might lie in alternative attack methodologies involving authenticated execution of native Windows commands to accomplish the majority of shell reliant tasks common to most network level penetration tests. The techniques I will be discussing were developed precisely with this style of attack in mind. Using these new tools, I will demonstrate how to accomplish the same degree of network level compromise that has been enjoyed in the past with shell-based attack vectors, while avoiding detection from AV solut
It is bug related to UNIX bash system. Doc which explain completely about the shell shock bug and it includes the step by step code segments related to shell shock bug
What is Bash?
Bash is the shell, a shell is a program that translates your commands into something the device's OS can understand or command language interpreter, for the operating system. The name is an acronym for the ‘Bourne-Again SHell’, a pun on Stephen Bourne, the author of the direct ancestor of the current Unix shell sh, which appeared in the Seventh Edition Bell Labs Research version of Unix. Bash is the default shell and is quite portable. It currently runs on nearly every version of UNIX and a few other operating.
Алексей Старов - Как проводить киберраследования?HackIT Ukraine
«Cybercrime» является особым направлением в области компьютерной безопасности и приватности. Это направление объединяет научные работы, которые исследуют различные сценарии атак или мошенничества, анализируют вредоносные экосистемы, обнаруживают злоумышленников и изучает их методы с целью разработки эффективных мер противодействия. В текущем докладе будут предоставлены рекомендации о том, как проводить киберрасследования, основываясь на примерах из наших работ и статей. Например, я расскажу о нашем масштабном исследовании вредоносных веб-оболочек и как мы смогли обнаружить жертв и нападающих по всему земному шару, а так же о том, как мы использовали навыки социальной инженерии, чтобы исследовать экосистему мошеннической технической поддержки, и многое другое. Моя цель состоит в том, чтобы заинтересовать научных исследователей и других представителей области ИБ в работе по направлению “Cybercrime”, в поиске различных путей предотвращения и расследования киберпреступлений. А также, показать, что подобные полезные исследования не всегда требует огромных ресурсов и сотрудничеств. Формат доклада: разговор в виде легкого семинара с элементами коллективного мозгового штурма (ноутбук не требуется). Мы рассмотрим 3 урока, из каждого выделяя полезные методы, инструменты и навыки. Язык: русский (с элементами английского).
Serão demonstradas diversas técnicas de ataque, tais como: Injeções de codigos,brute force, backdoors, root kits, exploits e várias outras maneiras para acessar e se manter indevidamente a servidores,em contra-partida são discutidas melhores praticas para se
evitar os tipos de ataques citados. (Palestra realizada no 3º Festival de Software livre em belo horizonte - FSLBH)
Owning computers without shell access 2Royce Davis
These are the slides from my talk at BSides Puerto Rico 2013. I will post a link to the slides later.
Abstract:
For many years Penetration Testers have relied on gaining shell access to remote systems in order to take ownership of network resources and enterprise owned assets. AntiVirus (AV) companies are becoming increasingly more aware of shell signatures and are therefore making it more and more difficult to compromise remote hosts. The current industry mentality seams to believe the answer is stealthier payloads and super complex obfuscation techniques. I believe a more effective answer might lie in alternative attack methodologies involving authenticated execution of native Windows commands to accomplish the majority of shell reliant tasks common to most network level penetration tests. The techniques I will be discussing were developed precisely with this style of attack in mind. Using these new tools, I will demonstrate how to accomplish the same degree of network level compromise that has been enjoyed in the past with shell-based attack vectors, while avoiding detection from AV solut
It is bug related to UNIX bash system. Doc which explain completely about the shell shock bug and it includes the step by step code segments related to shell shock bug
What is Bash?
Bash is the shell, a shell is a program that translates your commands into something the device's OS can understand or command language interpreter, for the operating system. The name is an acronym for the ‘Bourne-Again SHell’, a pun on Stephen Bourne, the author of the direct ancestor of the current Unix shell sh, which appeared in the Seventh Edition Bell Labs Research version of Unix. Bash is the default shell and is quite portable. It currently runs on nearly every version of UNIX and a few other operating.
The bash vulnerability practical tips to secure your environmentAlienVault
A recently discovered hole in the security of the Bourne-Again Shell (bash) has the majority of Unix/Linux (including OS X) admins sweating bullets. You should be, too - attackers are actively exploiting the vulnerability on un-patched web servers, network services and daemons that use shell scripts with environment variables (this can include network equipment, industrial devices, etc.). So, what can you do to protect your environment?
Join us for a live demo covering:
*Insights from Jaime Blasco, Director of AlienVault Labs on how attackers are exploiting this vulnerability
*Practical tips to minimize your exposure to attack
*How AlienVault USM can detect the bash vulnerability, and alert you of active attacks
Shellshock, also known as Bashdoor, is a family of security bugs in the widely used Unix Bash shell, the first of which was disclosed on 24 September 2014. Many Internet-facing services, such as some web server deployments, use Bash to process certain requests, allowing an attacker to cause vulnerable versions of Bash to execute arbitrary commands. This can allow an attacker to gain unauthorized access to a computer system.
Internet security has reached the highest defcon level. Another day, another hack – the
new bug on the scene known as “Shellshock” blew up headlines and Twitter feeds.
I am Joe L. I am a Computer Science Assignment Help Expert at programminghomeworkhelp.com. I hold a Ph.D. in Programming from, University of Chicago, USA. I have been helping students with their homework for the past 9 years. I solve assignments related to Computer Science.
Visit programminghomeworkhelp.com or email support@programminghomeworkhelp.com.
You can also call on +1 678 648 4277 for any assistance with Computer Science assignments.
a unique framework for cybersecurity simulation and red teaming operations, windows auditing for newer vulnerabilities, misconfigurations and privilege escalations attacks, replicate the tactics and techniques of an advanced adversary in a network. this slide has been presented at DragonCon HongKong Conference
Demonstrates remote code execution in the presence of modern OS security features. Stresses the importance of secure programming. Explains the binary reverse engineering process.
Security breaches have strong foot on healthcare industry this year. Nearly half of the organizations in healthcare were hit by security threats at least once this year and it is expected to increase in the forthcoming years.
The security breaches under HIPAA Violations could be classified as
• Stealth of Devices
• Process loopholes
• Employee Snooping
• Software defects
• Hacking
ONC Releases 10-Year Vision To Achieve Interoperability in Health ITViSolve, Inc.
The Office of the National Coordinator for Health Information Technology recently released a vision document to achieve Interoperability in Health IT. Spread over 3, 6 and 10 years, the vision document highlights the pressing need to achieve interoperability among different Health IT systems.
This document talks about the new rule that was suggested by U.S. Department of Health and Human Sciences (HHS), with respect to sharing of lab test results with patients, as an amendment to Clinical Laboratory Improvement Amendments (CLIA) of 1988 regulations.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Leading Change strategies and insights for effective change management pdf 1.pdf
ShellShock (Software BASH Bug)
1. 4010, Moorpark Avenue, #205, San Jose, California 95117
Shellshock is a security bug in Bash (Bourne Again SHell) command-line interpreter, mostly known as shell. Linux expert Stéphane Chazelas revealed this bug on 24th September 2014, and it is more severe than Heartbleed bug. Shellshock allows attackers to gain unauthorized access to computer system by executing arbitrary commands and it is officially documented as CVE-2014-6271 and CVE-2014- 7169.
Who is Vulnerable?
Theoretically all systems using bash are vulnerable, but most systems connected to the internet are exposed to remote exploitation. Linux and Apple's OSX (since 10.3) which uses bash as default command line interpreter are highly vulnerable. Generally in Windows, system bash is not the default interpreter but if the user changes bash as default interpreter, then it is also vulnerable.
Where bug occurs?
This bug is found under Bash's parsing code which unintentionally executes commands when concatenated, to the end of function definitions that are stored in the values of environment variables.
How it makes vulnerable?
An attacker who has access to a remote vector, will be able to remotely inject Bash commands on the system without any kind of authentication and enables the hacker to process all tasks with the attacked system that a normal user could do.
How attacker exploiting it?
HTTP Servers- The most attack and targets are pointed towards HTTP web servers. Servers that run on Common Gateway Interface (CGI) or FastCGI have the capability to expose Bash to a HTTP request. A maliciously crafted HTTP request allows the attacker to inject arbitrary commands onto the server with Bash invoking it to execute them. Bash can be called directly by the CGI (i.e. A Bash script), or could be called via a sub-process and system command. If Bash is started within the context of this malicious CGI request, the vulnerability gets triggered.
For example, CGI could execute a PHP script, which includes a call to system. When this is triggered over a system having Bash as the default shell, it leads to vulnerable attack.
DHCP- In this type of attack Apple OSX is unaffected. The DHCP client with LINUX and UNIX system uses Bash to configure the network interfaces. This attack can be exploited when the system connects to a malicious DHCP server. The vulnerable DHCP client will use variables provided by DHCP server and save them under environment variables. This generally happens when the user tries to connect to DHCP server through public Wi- Fi access points.
ShellShock
(Software BASH Bug)
2. 4010, Moorpark Avenue, #205, San Jose, California 95117
SSH- Mostly SSH requires a user for authentication privileges in accessing the commands. The BASH is capable of overcoming the restriction with privileged escalations.
CUPS (Common UNIX printing System)
CUPS is a print server commonly used with Linux and UNIX systems. On processing filters CUPS uses user controlled variables to set environment variables. This makes it vulnerable when CUPS initializes Bash during its process.
How to fix?
By upgrading to the latest version of bash, it can be fixed using the following commands for CentOS and Red Hat Linux “yum update bash”
How to test?
To check the vulnerability of the system, the following commands could be used:
CVE-2014-6271 Vulnerability check
Execute the following command in terminal “env 'x=() { :;}; echo vulnerable' 'BASH_FUNC_x()=() { :;}; echo vulnerable' bash -c "echo test".
If output contains the word ‘vulnerable’, then system is vulnerable.
CVE-2014-7169 Vulnerability check
Execute the following command in terminal “cd /tmp; rm -f /tmp/echo; env 'x=() { (a)=>' bash -c "echo date"; cat /tmp/echo”
If system is not vulnerable, it will produce the following output.
#cd /tmp; rm -f /tmp/echo; env 'x=() { (a)=>' bash -c "echo date"; cat /tmp/echo date cat: /tmp/echo: No such file or directory
If it’s vulnerable, then it will produce the following output
#cd /tmp; rm -f /tmp/echo; env 'x=() { (a)=>' bash -c "echo date"; cat /tmp/echo bash: x: line 1: syntax error near unexpected token `=' bash: x: line 1: `' bash: error importing function definition for `x'
Other CVE'S of Shellshock
1. CVE-2014-6277 and CVE-2014-6278 relates to the parsing of function definitions in environment variables by Bash. It was discovered by Michal Zalewski.
2. CVE-2014-7186 and CVE-2014-7187 relates to an out-of-bounds memory access error in the Bash parser code. While working on patching Shellshock, Red Hat researcher Florian Weimer found this bug.
3. 4010, Moorpark Avenue, #205, San Jose, California 95117
Fix for LINUX:
The following are the links that could be used in accessing the patches and fixes appropriate to the OS, dated 24th September 2014.
1. Debian: https://www.debian.org/security/2014/dsa-3032
2. Ubuntu: http://www.ubuntu.com/usn/usn-2362-1/
3. Red Hat: https://access.redhat.com/articles/1200223*
4. CentOS: http://centosnow.blogspot.com/2014/09/critical- bash-updates-for-centos-5.html
5. Novell/SUSE: http://support.novell.com/security/cve/CVE-2014- 6271.html
Fix for Apple OSX Systems
Being aware of the risks, Apple has released the patches to fix OS X's vulnerability to the Shellshock bug, dated 29th September 2014.
Patch can be downloaded from the following links.
1. Mavericks: Bash Update for OS X Mavericks
2. Mountain Lion: Bash Update for OS X Mountain Lion
3. Lion: Bash Update for OS X Lion
About ViSolve
ViSolve, Inc. is a software services and consulting firm with expertise in Healthcare and Cloud. ViSolve is headquartered at San Jose, CA with best in class Development & Support center in Coimbatore, India. To know more about how ViSolve can enhance your IT capabilities, get in touch with us:
Website: www.visolve.com
Email: services@visolve.com
Twitter: @ViSolve_Inc
Google Plus: plus.google.com/+ViSolveUSA
Facebook: facebook.com/ViSolve
LinkedIn: www.linkedin.com