CVE-2021-36087
The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.
- Score
- CVSS 3.1 3.3 Low
- Status
- Modified - cve@mitre.org
- Published
- 2021-07-01
- Last modified
- 2026-10-14
- Weaknesses
- CWE-125
Affected products
- Fedora (Fedoraproject)
- Selinux (Selinux Project)
- Ruggedcom Rox Mx5000 (Siemens)
- Ruggedcom Rox Mx5000re (Siemens)
- Ruggedcom Rox Rx1400 (Siemens)
- Ruggedcom Rox Rx1500 (Siemens)
- Ruggedcom Rox Rx1501 (Siemens)
- Ruggedcom Rox Rx1510 (Siemens)
- Ruggedcom Rox Rx1511 (Siemens)
- Ruggedcom Rox Rx1512 (Siemens)
- Ruggedcom Rox Rx1524 (Siemens)
- Ruggedcom Rox Rx1536 (Siemens)
- Ruggedcom Rox Rx5000 (Siemens)
- Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
- Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
- Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
References
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675
- https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/
- https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCK…
- https://security.netapp.com/advisory/ntap-20250207-0004/
- https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-202008.html
