Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2021-44731

Disclosure Date: February 17, 2022 •
CVE-2021-44731 CVSS v3 Base Score: 7.8
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Description

A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap’s private mount namespace and causing snap-confine to execute arbitrary code and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

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CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
6
Exploitability Score:
1.1
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
High
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Changed
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
snapd 2.54.2
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • canonical,
  • debian,
  • fedoraproject

Products

  • debian linux 10.0,
  • debian linux 11.0,
  • fedora 34,
  • fedora 35,
  • snapd,
  • ubuntu linux 18.04,
  • ubuntu linux 20.04,
  • ubuntu linux 21.10
Technical Analysis