6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
29.7%
Severity: High
Date : 2021-02-12
CVE-ID : CVE-2021-26910
Package : firejail
Type : privilege escalation
Remote : No
Link : https://security.archlinux.org/AVG-1545
The package firejail before version 0.9.64.4-1 is vulnerable to
privilege escalation.
Upgrade to 0.9.64.4-1.
The problem has been fixed upstream in version 0.9.64.4.
The issue can be mitigated by setting “overlayfs no” in
/etc/firejail/firejail.config.
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.
A local unprivileged attacker can obtain arbitrary file system access
for an application running within a firejail sandbox, leading to
potential privilege escalation.
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/
https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
https://security.archlinux.org/CVE-2021-26910
6.9 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
29.7%