SB2022122603 - Information disclosure in Linux kernel ksmbd
Published: December 26, 2022
Security Bulletin ID
SB2022122603
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2022-47940)
The vulnerability allows a remote user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in smb2_write in fs/ksmbd/smb2pdu.c. A remote user can trigger an out-of-bounds read error and read contents of memory on the system.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/158a66b245739e15858de42c0ba60fcf3de9b8e6
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=158a66b245739e15858de42c0ba60fcf3de9b8e6
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.18
- http://www.openwall.com/lists/oss-security/2022/12/23/10
- https://www.zerodayinitiative.com/advisories/ZDI-22-1691/