Vulnerability Details : CVE-2021-26910
Potential exploit
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.
Products affected by CVE-2021-26910
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:firejail_project:firejail:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-26910
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 26 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-26910
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.9
|
MEDIUM | AV:L/AC:M/Au:N/C:C/I:C/A:C |
3.4
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
MITRE | |
|
7.0
|
HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.0
|
5.9
|
NIST |
CWE ids for CVE-2021-26910
-
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-26910
-
http://www.openwall.com/lists/oss-security/2021/02/09/1
oss-security - Re: [cve-pending] Firejail: root privilege escalation in OverlayFS codeExploit;Mailing List;Patch;Third Party Advisory
-
https://github.com/netblue30/firejail/releases/tag/0.9.64.4
Release Version 0.9.64.4 · netblue30/firejail · GitHubRelease Notes;Third Party Advisory
-
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
Exploit;Third Party Advisory
-
https://security.gentoo.org/glsa/202105-19
Firejail: Privilege escalation (GLSA 202105-19) — Gentoo securityThird Party Advisory
-
https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/
Rigged Race Against Firejail for Local RootExploit;Third Party Advisory
-
https://www.debian.org/security/2021/dsa-4849
Debian -- Security Information -- DSA-4849-1 firejailThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html
[SECURITY] [DLA 2554-1] firejail security updateThird Party Advisory
-
https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
disabled overlayfs, 0.9.64.4 testing · netblue30/firejail@97d8a03 · GitHubPatch;Third Party Advisory
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