CVE-2021-36084 — Use After Free in Project Selinux

CWE-416 — Use After Free7 documents6 sources
Severity
3.3LOWNVD
EPSS
0.0%
top 93.37%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Debian LibsepolFedoraproject FedoraSelinux Project Selinux
Timeline
PublishedJul 1
Latest updateMay 24

Description

The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LExploitability: 1.8 | Impact: 1.4

Affected Packages2 packages

▶debiandebian/libsepol< libsepol 3.3-1 (bookworm)

Also affects: Fedora 35

Patches

Patch: bugs.chromium.org ↗Patch: github.com ↗Patch: bugs.chromium.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-8p9r-xrm6-68wq: The CIL compiler in SELinux 3↗2022-05-24
▶
OSV
libsepol vulnerabilities↗2022-04-27
▶
OSV
CVE-2021-36084: The CIL compiler in SELinux 3↗2021-07-01
▶

📋Vendor Advisories

3
Ubuntu
libsepol vulnerabilities↗2022-04-27
▶
Red Hat
libsepol: use-after-free in __cil_verify_classperms()↗2021-04-19
▶
Debian
CVE-2021-36084: libsepol - The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms ...↗2021
▶
CVE-2021-36084 — Use After Free in Project Selinux | cvebase