SB2022120139 - Off-by-one in Systemd
Published: December 1, 2022
Security Bulletin ID
SB2022120139
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Off-by-one (CVE-ID: CVE-2022-3821)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an off-by-one error within the format_timespan() function in time-util.c. A local user can trigger an off-by-one error and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://github.com/systemd/systemd/issues/23928
- https://github.com/systemd/systemd/commit/9102c625a673a3246d7e73d8737f3494446bad4e
- https://github.com/systemd/systemd/pull/23933
- https://bugzilla.redhat.com/show_bug.cgi?id=2139327
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RVBQC2VLSDVQAPJTEMTREXDL4HYLXG2P/