CVE-2021-36084

2021-07-0100:00:00

ubuntu.com

3.3 Low

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

2.1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

0.001 Low

EPSS

Percentile

39.7%

JSON

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).

Bugs

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

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlibsepol< 2.7-1ubuntu0.1UNKNOWN
ubuntu20.04noarchlibsepol< 3.0-1ubuntu0.1UNKNOWN
ubuntu21.10noarchlibsepol< 3.1-1ubuntu2.1UNKNOWN
ubuntu16.04noarchlibsepol< 2.4-2ubuntu0.1~esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	libsepol	< 2.7-1ubuntu0.1	UNKNOWN
ubuntu	20.04	noarch	libsepol	< 3.0-1ubuntu0.1	UNKNOWN
ubuntu	21.10	noarch	libsepol	< 3.1-1ubuntu2.1	UNKNOWN
ubuntu	16.04	noarch	libsepol	< 2.4-2ubuntu0.1~esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN