Double Free Race Vulnerability in cifs Package
Summary
GSD-2022-1000842: cifs: fix double free race when mount fails in cifs_get_root(). Affects Kernel versions < df9db1a2af37f39ad1653c7b9b0d275d72d0bc67. No fix is published. How to fix ↓
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Background
The cifs package is a component of the Linux Kernel that provides support for the Common Internet File System (CIFS) protocol. CIFS allows Linux systems to access files and resources on remote Windows servers. It is widely used for network file sharing and provides features such as authentication, file and printer sharing, and access control. The cifs package is responsible for handling the mounting and accessing of CIFS shares on Linux systems.
Vulnerability Detail
The identified vulnerability in the cifs package is a double free race condition that occurs when the mount process fails in the cifs_get_root() function. A double free vulnerability refers to a memory corruption issue where a program attempts to free the same memory location twice, potentially leading to memory corruption and exploitation by an attacker. In this case, the vulnerability arises due to a race condition, where multiple threads or processes access and manipulate the same memory concurrently, leading to the double free scenario. If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition on 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 mitigate the risk by ensuring they have updated their Linux Kernel to the fixed version mentioned above.
Conclusion
The double free race vulnerability in the cifs package can be mitigated by updating the Linux Kernel to version v5.10.104 or later. This update includes the necessary fix to address the vulnerability. It is important to promptly apply the update to ensure the security and stability of systems utilizing the cifs package. For further support or assistance with 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 race condition is a memory corruption issue where a program attempts to free the same memory location twice, potentially leading to memory corruption and exploitation by an attacker. In this vulnerability, the race condition occurs when the mount process fails in the cifs_get_root() function.
If successfully exploited, this vulnerability could allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition on the affected system.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.104 or later, which includes the necessary fix for the double free race condition in cifs_get_root().
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by ensuring they have updated their Linux Kernel to the fixed version mentioned above.
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