cifs: NULL dereference vulnerability in cifs_compose_mount_options()
Summary
GSD-2021-1001252: cifs: prevent NULL deref in cifs_compose_mount_options(). Affects Kernel versions < e58c162789becede894d3e94c0ce6695a2ef5796. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The cifs package is a part of the Linux Kernel ecosystem and provides support for the Common Internet File System (CIFS) protocol. CIFS allows Linux systems to access files and resources on remote Windows servers. The cifs_compose_mount_options() function is responsible for composing mount options for CIFS filesystems. However, a vulnerability exists in this function that can lead to a NULL dereference.
Vulnerability Detail
The vulnerability in cifs_compose_mount_options() arises due to a lack of proper validation of mount options. An attacker can exploit this vulnerability by providing specially crafted mount options, which can trigger a NULL pointer dereference. This can result in a kernel crash or potentially allow the attacker to execute arbitrary code with kernel privileges. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
There is no known workaround for this vulnerability.
Conclusion
The cifs package in the Linux Kernel is vulnerable to a NULL dereference vulnerability in the cifs_compose_mount_options() function. This vulnerability can result in a kernel crash or potential arbitrary code execution with kernel privileges. It is recommended to update to Linux Kernel version v5.10.53 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability can range from a kernel crash to potential arbitrary code execution with kernel privileges.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will alert you in real-time if your application is affected.
No, there is no known workaround for this vulnerability. It is recommended to update to the fixed version of the Linux Kernel.
There are no known exploits for this vulnerability at the moment. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
You can find more information about this vulnerability in the GSD-2021-1001252 JSON report available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001252.json
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
