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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.3 LOW
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 39.9%
Affected Products (NVD)
VendorProductVersion
selinux_projectselinux
3.2
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP
V3.1.0 ≤
𝑥
< V3.1.5
ADP
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
V3.1.0 ≤
𝑥
< V3.1.5
ADP
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP
V3.1.0 ≤
𝑥
< V3.1.5
ADP
SiemensRUGGEDCOM ROX MX5000
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX MX5000RE
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1400
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1500
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1501
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1510
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1511
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1512
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1524
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX1536
𝑥
< V2.17.0
ADP
SiemensRUGGEDCOM ROX RX5000
𝑥
< V2.17.0
ADP
Debian logo
Debian Releases
Debian Product
Codename
libsepol
bookworm
3.4-2.1
fixed
bullseye
vulnerable
bullseye (security)
3.1-1+deb11u1
fixed
buster
no-dsa
sid
3.7-1
fixed
stretch
no-dsa
trixie
3.7-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libsepol
bionic
Fixed 2.7-1ubuntu0.1
released
focal
Fixed 3.0-1ubuntu0.1
released
groovy
ignored
hirsute
ignored
impish
Fixed 3.1-1ubuntu2.1
released
jammy
not-affected
trusty
not-affected
xenial
Fixed 2.4-2ubuntu0.1~esm1
released
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libsepol-devel
suse enterprise desktop 15 SP6
3.5-150600.1.49
fixed
suse enterprise desktop 15 SP7
3.5-150600.1.49
fixed
suse enterprise sap 15 SP6
3.5-150600.1.49
fixed
suse enterprise sap 15 SP7
3.5-150600.1.49
fixed
suse enterprise server 15 SP6
3.5-150600.1.49
fixed
suse enterprise server 15 SP7
3.5-150600.1.49
fixed
libsepol2
suse enterprise desktop 15 SP6
3.5-150600.1.49
fixed
suse enterprise desktop 15 SP7
3.5-150600.1.49
fixed
suse enterprise sap 15 SP6
3.5-150600.1.49
fixed
suse enterprise sap 15 SP7
3.5-150600.1.49
fixed
suse enterprise server 15 SP6
3.5-150600.1.49
fixed
suse enterprise server 15 SP7
3.5-150600.1.49
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
libsepol
RHEL 8
0:2.9-3.el8
fixed
libsepol-devel
RHEL 8
0:2.9-3.el8
fixed
libsepol-static
RHEL 8
0:2.9-3.el8
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
libsepol
Amazon Linux 2
0:2.5-10.amzn2.0.1
fixed
Amazon Linux 2023
0:3.4-3.amzn2023.0.3
fixed
libsepol-debuginfo
Amazon Linux 2
0:2.5-10.amzn2.0.1
fixed
Amazon Linux 2023
0:3.4-3.amzn2023.0.3
fixed
libsepol-debugsource
Amazon Linux 2023
0:3.4-3.amzn2023.0.3
fixed
libsepol-devel
Amazon Linux 2
0:2.5-10.amzn2.0.1
fixed
Amazon Linux 2023
0:3.4-3.amzn2023.0.3
fixed
libsepol-static
Amazon Linux 2
0:2.5-10.amzn2.0.1
fixed
Amazon Linux 2023
0:3.4-3.amzn2023.0.3
fixed
libsepol-utils
Amazon Linux 2023
0:3.4-3.amzn2023.0.3
fixed
libsepol-utils-debuginfo
Amazon Linux 2023
0:3.4-3.amzn2023.0.3
fixed
Common Weakness Enumeration
References
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675
https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/
https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675
https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml
https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/
https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ%40mail.gmail.com/T/
https://security.netapp.com/advisory/ntap-20250207-0004/
https://cert-portal.siemens.com/productcert/html/ssa-202008.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html