SB2022030911 - Information disclosure in Linux kernel NFS implementation
Published: March 9, 2022
Security Bulletin ID
SB2022030911
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Missing initialization of resource (CVE-ID: CVE-2022-24448)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to missing initialization of resource within the fs/nfs/dir.c in the Linux kernel. If an application sets the O_DIRECTORY flag, and tries to open a regular file, nfs_atomic_open() performs a regular lookup. If a regular file is found, ENOTDIR should occur, but the server instead returns uninitialized data in the file descriptor.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ac795161c93699d600db16c1a8cc23a65a1eceaf
- https://www.spinics.net/lists/stable/msg531976.html
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.5
- https://github.com/torvalds/linux/commit/ac795161c93699d600db16c1a8cc23a65a1eceaf