Description (CNA)
A flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing 'Z' timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Because sudo is a setuid-root program, an unprivileged local user can set TZ to an extreme timezone offset to shift the authorization window by up to approximately 25 hours, causing expired rules to be treated as valid. This allows the user to execute commands outside the intended time window. Authentication is not bypassed; only the time-based authorization check is affected.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 10 | unaffected 0:1.9.17-10.p2.el10_2.7 before * |
| Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support | unaffected 0:1.9.15-8.p5.el10_0.5 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:1.9.5p2-2.el8_10 before * |
| Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service | unaffected 0:1.9.5p2-1.el8_8.4 before * |
| Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | unaffected 0:1.9.5p2-1.el8_8.4 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:1.9.17p2-3.el9_8.3 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:1.9.17p2-3.el9_8.3 before * |
| Red Hat / Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | unaffected 0:1.9.5p2-10.el9_4.4 before * |
| Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Support | unaffected 0:1.9.5p2-10.el9_6.4 before * |
| Red Hat / Red Hat Hardened Images | unaffected 1.9.17-16.p2.2.hum1 before * |
| Red Hat / Red Hat Update Infrastructure 5 | unaffected 1791964013 before * |
| Red Hat / Red Hat Update Infrastructure 5 | unaffected 1791978693 before * |
| Red Hat / Red Hat Enterprise Linux 7 | affected |
CWE
CWE-863
References
- https://access.redhat.com/errata/RHSA-2026:71609
- https://access.redhat.com/errata/RHSA-2026:75571
- https://access.redhat.com/errata/RHSA-2026:75579
- https://access.redhat.com/errata/RHSA-2026:75580
- https://access.redhat.com/errata/RHSA-2026:82939
- https://access.redhat.com/errata/RHSA-2026:86633
- https://access.redhat.com/errata/RHSA-2026:86634
- https://access.redhat.com/errata/RHSA-2026:86635
- https://access.redhat.com/errata/RHSA-2026:87026
- https://access.redhat.com/security/cve/CVE-2026-96512
- https://bugzilla.redhat.com/show_bug.cgi?id=2539327
- https://github.com/sudo-project/sudo/commit/1820a349687522f51023d1ae5925125f59679a8c
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.