Incomplete Patch in bash Allows Injection of Characters into Another Environment
Summary
DSA-3035-1: bash - security update. Affects bash versions < 4.2+dfsg-0.1+deb7u3. Fixed in 4.2+dfsg-0.1+deb7u3. How to fix ↓
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Background
Bash, the GNU Bourne-Again Shell, is a widely used command-line interpreter for Unix-like operating systems. It provides a powerful scripting language and is the default shell for many Linux distributions. However, a vulnerability was discovered in bash that allowed certain characters to be injected into another environment, potentially leading to unauthorized access or code execution.
Vulnerability Detail
The vulnerability, known as CVE-2014-7169, was a result of an incomplete patch applied to fix a previous vulnerability (CVE-2014-6271). The patch did not fully address the issue, allowing malicious characters to still be injected into another environment. This could be exploited by an attacker to execute arbitrary commands or manipulate the environment variables of a system. Additionally, the bash parser had two out-of-bounds array access vulnerabilities, which could be exploited to crash the shell or potentially execute arbitrary code.
How To Fix
Minimum fixed version
4.2+dfsg-0.1+deb7u3
This is the first release that contains the fix.
sudo apt-get install --only-upgrade bashTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by ensuring they have the latest version of the bash package installed and regularly updating their system to receive security patches.
Conclusion
The incomplete patch in bash allowed the injection of characters into another environment, posing a security risk for systems using vulnerable versions of the package. It is crucial to upgrade to the fixed version and regularly update the bash package to protect against this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
See every vulnerability recorded for bash →
FAQ
Bash is a command-line interpreter and scripting language used in Unix-like operating systems. It provides a powerful and flexible environment for executing commands and writing scripts.
CVE-2014-7169 is a vulnerability in bash that allows the injection of malicious characters into another environment. It was discovered as an incomplete patch for a previous vulnerability (CVE-2014-6271).
The vulnerability could allow an attacker to execute arbitrary commands or manipulate the environment variables of a system. This could lead to unauthorized access, data breaches, or the execution of malicious code.
To fix this vulnerability, you should upgrade the bash package to version 4.2+dfsg-0.1+deb7u3 or later. This update includes a hardening measure to prevent the injection of malicious characters.
While there is no specific workaround mentioned, keeping your system up to date with the latest security patches and regularly updating the bash package can help mitigate the risk.
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