Double Free Vulnerability in cifs Package
Summary
GSD-2022-1003422: cifs: fix potential double free during failed mount. Affects Kernel versions < ce0008a0e410cdd95f0d8cd81b2902ec10a660c4. No fix is published. How to fix ↓
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Background
The cifs package is a component of the Linux Kernel, which is responsible for providing support for the Common Internet File System (CIFS) protocol. CIFS allows Linux systems to access files and resources on remote Windows servers. The package includes various functions and modules that handle the mounting and management of CIFS shares. However, a vulnerability has been discovered in the package that could lead to a double free during a failed mount operation.
Vulnerability Detail
The identified vulnerability in the cifs package occurs when a mount operation fails. In such cases, there is a potential for a double free, which can result in memory corruption and potentially lead to a system crash or arbitrary code execution. This vulnerability could be exploited by an attacker who can trigger a failed mount operation, either by providing malicious input or by exploiting other weaknesses in the system. The impact of this vulnerability can vary depending on the context and privileges of the affected system.
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. However, users can minimize the risk by following general security best practices, such as keeping their systems up to date with the latest patches and updates, and implementing strong access controls to limit the exposure of the cifs package.
Conclusion
The double free vulnerability in the cifs package can lead to memory corruption and potential system crashes or arbitrary code execution. It is crucial to update the Linux Kernel to the latest version to mitigate this risk. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The cifs package is a component of the Linux Kernel that provides support for the Common Internet File System (CIFS) protocol, allowing Linux systems to access files and resources on remote Windows servers.
A double free vulnerability occurs when a program attempts to free a memory block that has already been freed. This can lead to memory corruption and potentially enable an attacker to execute arbitrary code or crash the system.
This vulnerability can be exploited by triggering a failed mount operation in the cifs package. An attacker may achieve this by providing malicious input or by exploiting other weaknesses in the system.
The impact of this vulnerability can vary depending on the context and privileges of the affected system. It could potentially lead to a system crash or allow an attacker to execute arbitrary code.
To mitigate the risk of this vulnerability, it is recommended to update the Linux Kernel to version v5.15.46 or later, which includes the fix for this issue. Additionally, following general security best practices, such as keeping systems up to date and implementing strong access controls, can help minimize the risk.
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