Vulnerability Monitor

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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.

Published

2021-02-08T20:15:13.090

Last Modified

2024-11-21T05:57:01.223

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.4

Impact Score

10.0

Weaknesses

Type: Primary
CWE-367

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	firejail_project	firejail	< 0.9.64.4	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes

References

http://www.openwall.com/lists/oss-security/2021/02/09/1 Exploit, Mailing List, Patch, Third Party Advisory ([email protected])
https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b Patch, Third Party Advisory ([email protected])
https://github.com/netblue30/firejail/releases/tag/0.9.64.4 Release Notes, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202105-19 Third Party Advisory ([email protected])
https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/ Exploit, Third Party Advisory ([email protected])
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt Exploit, Third Party Advisory ([email protected])
https://www.debian.org/security/2021/dsa-4849 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/02/09/1 Exploit, Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/netblue30/firejail/releases/tag/0.9.64.4 Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202105-19 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2021/dsa-4849 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)