CVE-2016-1585

Publication date 22 April 2019

Last updated 25 September 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

In all versions of AppArmor mount rules are accidentally widened when compiled.

From the Ubuntu Security Team

It was discovered that the AppArmor policy compiler incorrectly generated looser restrictions than expected for rules allowing mount operations. A local attacker could possibly use this to bypass AppArmor restrictions in applications where some mount operations were permitted.

Read the notes from the security team

Status

Package Ubuntu Release Status
apparmor 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored end of life, was needed
22.10 kinetic Ignored end of life, was needed
22.04 LTS jammy
Fixed 3.0.4-2ubuntu2.4
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 2.13.3-7ubuntu5.4
19.10 eoan Ignored end of life
19.04 disco Ignored end of life
18.10 cosmic Ignored end of life
18.04 LTS bionic
Vulnerable
17.10 artful Ignored end of life
17.04 zesty Ignored end of life
16.10 yakkety Ignored end of life
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty Ignored end of ESM support, was needs-triage
12.04 LTS precise Ignored end of life

Notes

sbeattie

apparmor policies that do not grant the ability to perform any mount permissions are not affected.

alexmurray

Original fix introduced a regression, requiring the fix from https://gitlab.com/apparmor/apparmor/-/merge_requests/1048 as well

sbeattie

additional regression fix in https://gitlab.com/apparmor/apparmor/-/merge_requests/1054

Patch details

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

Package Patch details
apparmor

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H