CVE-2021-26910

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.

CVSS v3.0 7.0 HIGH
CVSS v2.0 6.9 MEDIUM

7.0^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.9^/10

CVSS v2.0 : MEDIUM

Vector : AV:L/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b	Patch Third Party Advisory
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt	Exploit Third Party Advisory
https://github.com/netblue30/firejail/releases/tag/0.9.64.4	Release Notes Third Party Advisory
https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/	Exploit Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/09/1	Exploit Mailing List Patch Third Party Advisory
https://www.debian.org/security/2021/dsa-4849	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html	Third Party Advisory
https://security.gentoo.org/glsa/202105-19	Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:firejail_project:firejail:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Information

Published : 2021-02-08 12:15

Updated : 2022-05-23 15:01

NVD link : CVE-2021-26910

Mitre link : CVE-2021-26910

JSON object : View

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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Products Affected

firejail_project

firejail

debian

debian_linux

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