Vulnerability in mxser package: xmit_buf leak in activate when LSR == 0xff
Summary
GSD-2022-1002233: mxser: fix xmit_buf leak in activate when LSR == 0xff. Affects Kernel versions >= 6769140d304731f0a3b177470a2adb4bacd9036b, < 996291d06851a26678a0fab488b6e1f0677c0576. No fix is published. How to fix ↓
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Background
The mxser package is a component of the Linux Kernel, which is responsible for handling serial communication. It provides support for multiport serial devices. The vulnerability in question affects the activate function of mxser when the Line Status Register (LSR) is equal to 0xff. This vulnerability was introduced in version v2.6.33 of the Linux Kernel and has been fixed in version v5.4.189.
Vulnerability Detail
The vulnerability occurs due to a xmit_buf leak in the activate function of mxser when the LSR is set to 0xff. This can lead to a resource leak, potentially causing memory corruption or denial of service. An attacker may be able to exploit this vulnerability to execute arbitrary code or crash the system. The vulnerability was discovered and fixed in the Linux Kernel.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. The recommended approach is to update the Linux Kernel to the fixed version.
Conclusion
In conclusion, the mxser package in the Linux Kernel is vulnerable to a xmit_buf leak in the activate function when the LSR is set to 0xff. This vulnerability can lead to resource leaks, memory corruption, or denial of service. It is recommended to update the Linux Kernel to version v5.4.189 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
mxser is a component of the Linux Kernel that handles multiport serial devices.
This vulnerability can lead to resource leaks, memory corruption, or denial of service. It may allow an attacker to execute arbitrary code or crash the system.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and it will alert you in real-time if any open-source vulnerabilities are detected.
Yes, the vulnerability has been fixed in version v5.4.189 of the Linux Kernel. It is recommended to update to this version or later to mitigate the vulnerability.
You can find more information about this vulnerability in the GSD-2022-1002233 entry of the GSD Database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1002xxx/GSD-2022-1002233.json
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