CVE-2021-26910
Firejail TOCTOU race condition vulnerability
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.
INFO
Published Date :
Feb. 8, 2021, 8:15 p.m.
Last Modified :
May 23, 2022, 10:01 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2021-26910 has a 3 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-26910
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-26910.
| URL | Resource |
|---|---|
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Makefile Shell M4 Python Vim Script C Roff Awk Perl
https://github.com/netblue30/firejail.git
Makefile M4 Python Shell C Perl Awk Vim Script Roff
Linux namespaces and seccomp-bpf sandbox
Shell C Perl Makefile M4 Python Awk Roff Vim Script
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-26910 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-26910 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
May. 23, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202105-19 No Types Assigned https://security.gentoo.org/glsa/202105-19 Third Party Advisory -
CVE Modified by [email protected]
May. 26, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202105-19 [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 16, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2021/02/09/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/02/09/1 Exploit, Mailing List, Patch, Third Party Advisory Changed Reference Type https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b No Types Assigned https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b Patch, Third Party Advisory Changed Reference Type https://github.com/netblue30/firejail/releases/tag/0.9.64.4 No Types Assigned https://github.com/netblue30/firejail/releases/tag/0.9.64.4 Release Notes, Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html Third Party Advisory Changed Reference Type https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/ No Types Assigned https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/ Exploit, Third Party Advisory Changed Reference Type https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt No Types Assigned https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt Exploit, Third Party Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4849 No Types Assigned https://www.debian.org/security/2021/dsa-4849 Third Party Advisory Added CWE NIST CWE-367 Added CPE Configuration OR *cpe:2.3:a:firejail_project:firejail:*:*:*:*:*:*:*:* versions up to (excluding) 0.9.64.4 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 11, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html [No Types Assigned] -
CVE Modified by [email protected]
Feb. 10, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4849 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 09, 2021
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/02/09/1 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-26910 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-26910
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.07 }} 0.02%
score
0.27751
percentile