CVE-2021-26910

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 08-02-2021 09:15

Last modified: - 24-05-2022 12:01

Total changes: - 7

Description

Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation.

Common Vulnerability Scoring System (CVSS)

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

High

Attack complexity

Local

Attack vector

High

Availability

High

Confidentiality

High

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

7.0

Base score

1.0

5.9

Exploitability score

Impact score

Verification logic

vendor=firejail_project AND product=firejail AND versionEndExcluding=0.9.64.4

vendor=Debian AND product=debian_linux AND version=9.0

vendor=Debian AND product=debian_linux AND version=10.0

Reference

https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
https://github.com/netblue30/firejail/releases/tag/0.9.64.4
https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/
[oss-security] 20210209 Re: [cve-pending] Firejail: root privilege escalation in OverlayFS code-Exploit, Mailing List, Patch, Third Party Advisory
DSA-4849-Third Party Advisory
[debian-lts-announce] 20210211 [SECURITY] [DLA 2554-1] firejail security update-Third Party Advisory
GLSA-202105-19-Third Party Advisory

Keywords

CVE-2021-26910

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-26910

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures