SB2022021749 - Fedora 35 update for snapd

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2022021749

SB2022021749 - Fedora 35 update for snapd

Published: February 17, 2022

Security Bulletin ID SB2022021749
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Race condition (CVE-ID: CVE-2021-44731)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition in the snap-confine binary when preparing a private mount namespace for a snap.. A local user can  bind-mount their own contents inside the snap's private mount namespace and execute arbitrary code with root privileges.


2) UNIX hardlink following (CVE-ID: CVE-2021-44730)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a hardlink following issue within the the snap-confine binary. A local user can create a hardlink to system binaries and execute them with elevated privileges.


3) Input validation error (CVE-ID: CVE-2021-4120)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient validation of snap content interface and layout paths. A local user can inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References