CVEvulnerability
CVE-2021-26910
7.0 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-02-08
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 ([email protected])
- 7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-367
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.
Affected configurations
• firejail project firejail (< 0.9.64.4)
• debian debian linux 9.0
• debian debian linux 10.0
Related
Weakness · CWE (1)
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness
References
- http://www.openwall.com/lists/oss-security/2021/02/09/1 Exploit, Mailing List, Patch, Third Party Advisory
- https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b Patch, Third Party Advisory
- https://github.com/netblue30/firejail/releases/tag/0.9.64.4 Release Notes, 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
- https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/ Exploit, Third Party Advisory
- https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt Exploit, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4849 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/09/1 Exploit, Mailing List, Patch, Third Party Advisory
- https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b Patch, Third Party Advisory
- https://github.com/netblue30/firejail/releases/tag/0.9.64.4 Release Notes, 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
- https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/ Exploit, Third Party Advisory
- https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt Exploit, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4849 Third Party Advisory