Vulnerability in sudo - security update
Summary
DLA-707-1: sudo - security update. Affects sudo versions < 1.8.5p2-1+nmu3+deb7u2. Fixed in 1.8.5p2-1+nmu3+deb7u2. How to fix ↓
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Background
The sudo package is a widely used utility in the Debian 7 Wheezy ecosystem. It allows users to run programs with the security privileges of another user, typically the superuser. Sudo provides a means for administrators to delegate authority to users, allowing them to execute commands as root or other users. However, a security flaw has been discovered in sudo that could potentially allow a local user to bypass the noexec restriction and execute arbitrary commands with elevated privileges.
Vulnerability Detail
The vulnerability, identified as CVE-2016-7032 and CVE-2016-7076, arises from the sudo noexec restriction being bypassed when applications executed via sudo utilize certain C library functions with user-supplied arguments. Specifically, the system(), popen(), and wordexp() functions are affected. This flaw enables a local user with permission to run an application via sudo, despite the noexec restriction, to execute arbitrary commands with elevated privileges. The impact of this vulnerability is significant as it allows unauthorized users to gain unauthorized access and potentially compromise the system.
How To Fix
Minimum fixed version
1.8.5p2-1+nmu3+deb7u2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade sudoTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the security update promptly to mitigate the risk of exploitation.
Conclusion
The sudo package in Debian 7 Wheezy is vulnerable to a bypass of the noexec restriction, allowing local users to execute arbitrary commands with elevated privileges. To mitigate this risk, it is essential to upgrade the sudo package to version 1.8.5p2-1+nmu3+deb7u2 or later. Failure to address this vulnerability could result in unauthorized access and potential compromise of the system. For further assistance with vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for sudo →
FAQ
The sudo package allows users to run programs with the security privileges of another user, typically the superuser. It is commonly used to delegate authority to users, enabling them to execute commands as root or other users.
A local user with permission to run an application via sudo, despite the noexec restriction, can exploit this vulnerability by utilizing certain C library functions with user-supplied arguments. By doing so, they can execute arbitrary commands with elevated privileges.
The impact of this vulnerability is significant as it allows unauthorized users to gain unauthorized access and potentially compromise the system.
No, there is no known workaround for this vulnerability. It is crucial to apply the security update as soon as possible.
To update the sudo package, you can use the package manager to install the latest version or manually download the updated package from the official Debian repository and install it.
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