Vulnerability in Kernel: smackfs: restrict bytes count in smk_set_cipso()
Summary
UVI-2021-1001423: smackfs: restrict bytes count in smk_set_cipso(). Affects Kernel versions < 5c2dca9a7a7ff6a2df34158903515e2e4fd3d2b2. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionality for the proper functioning of the system. The smackfs module is a part of the Kernel that implements the Security-Enhanced Linux (SELinux) Mandatory Access Control (MAC) mechanism. It enforces access control policies based on security labels attached to processes and files. The smk_set_cipso() function in smackfs is responsible for setting the Common IP Security Option (CIPSO) label on a file. This label provides additional security attributes for network communication.
Vulnerability Detail
The vulnerability in smackfs arises from an unrestricted bytes count in the smk_set_cipso() function. This allows an attacker to provide a maliciously crafted input that exceeds the expected size, leading to a buffer overflow or other memory corruption issues. Exploiting this vulnerability could potentially result in privilege escalation, denial of service, or arbitrary code execution. The impact and attack plausibility of this vulnerability have not been proven yet.
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.
Conclusion
The vulnerability in Kernel's smackfs module can be mitigated by updating to the fixed version or applying the relevant patch. Keeping the Kernel up to date with the latest security patches is recommended. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a fundamental component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software.
smackfs is a module in the Kernel that implements the Security-Enhanced Linux (SELinux) Mandatory Access Control (MAC) mechanism.
The smk_set_cipso() function in smackfs is responsible for setting the Common IP Security Option (CIPSO) label on a file, providing additional security attributes for network communication.
Exploiting this vulnerability could lead to privilege escalation, denial of service, or arbitrary code execution.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
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