CVE-2021-26910

CVSS V2 Medium 6.9 CVSS V3 High 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.
Overview
  • CVE ID
  • CVE-2021-26910
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-02-08T20:15:13
  • Last Modified Date
  • 2022-05-23T22:01:20
Weakness Enumerations
CWE URL
CWE-367 http://cwe.mitre.org/data/definitions/367.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:firejail_project:firejail:*:*:*:*:*:*:*:* 1 OR 0.9.64.4
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 6.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.4
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 7
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
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
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-26910
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26910
History
Created Old Value New Value Data Type Notes
2022-05-10 16:14:49 Added to TrackCVE
2022-12-05 21:35:27 2021-02-08T20:15Z 2021-02-08T20:15:13 CVE Published Date updated
2022-12-05 21:35:27 2022-05-23T22:01:20 CVE Modified Date updated
2022-12-05 21:35:27 Analyzed Vulnerability Status updated