CVE-2021-36085

Publication date 1 July 2021

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

3.3 · Low

Score breakdown

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

From the Ubuntu Security Team

sbeattie> AppArmor is the default LSM in Ubuntu, issue only affects compilation of selinux policy sbeattie> trusty version predates the introduction of CIL

Status

Package Ubuntu Release Status
libsepol 22.04 LTS jammy
Not affected
21.10 impish
Fixed 3.1-1ubuntu2.1
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 3.0-1ubuntu0.1
18.04 LTS bionic
Fixed 2.7-1ubuntu0.1
16.04 LTS xenial
14.04 LTS trusty
Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libsepol

Severity score breakdown

Parameter Value
Base score 3.3 · Low
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-5391-1
    • libsepol vulnerabilities
    • 27 April 2022

Other references