CVE-2021-36084
Published: 1 July 2021
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).
Notes
Author | Note |
---|---|
sbeattie | AppArmor is the default LSM in Ubuntu, issue only affects compilation of selinux policy trusty version predates the introduction of CIL |
Priority
Status
Package | Release | Status |
---|---|---|
libsepol Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(3.3-1)
|
groovy |
Ignored
(end of life)
|
|
trusty |
Not vulnerable
(code not present)
|
|
upstream |
Released
(3.3-1)
|
|
bionic |
Released
(2.7-1ubuntu0.1)
|
|
focal |
Released
(3.0-1ubuntu0.1)
|
|
impish |
Released
(3.1-1ubuntu2.1)
|
|
hirsute |
Ignored
(end of life)
|
|
xenial |
Released
(2.4-2ubuntu0.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
Patches: upstream: https://github.com/SELinuxProject/selinux/commit/f34d3d30c8325e4847a6b696fe7a3936a8a361f3 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 3.3 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | Low |
Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |