CVE-2021-0920
Android Kernel Race Condition Vulnerability - [Actively Exploited]
Description
In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel
INFO
Published Date :
Dec. 15, 2021, 7:15 p.m.
Last Modified :
Nov. 21, 2024, 5:43 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
0.5
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Android kernel contains a race condition, which allows for a use-after-free vulnerability. Exploitation can allow for privilege escalation.
Apply updates per vendor instructions.
https://nvd.nist.gov/vuln/detail/CVE-2021-0920
Public PoC/Exploit Available at Github
CVE-2021-0920 has a 5 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2021-0920.
| URL | Resource |
|---|---|
| https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html | Mailing List Third Party Advisory |
| https://source.android.com/security/bulletin/2021-11-01 | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html | Mailing List Third Party Advisory |
| https://source.android.com/security/bulletin/2021-11-01 | Vendor 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
Map Vulnerabilities into Different Layers of the Container Image
Python
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
cisa-kev vulnerability 0day cisa exploits
Demo showing how to use the vulnerability module
Ruby Puppet PowerShell Shell
A collection of links related to Linux kernel security and exploitation
linux-kernel kernel-exploitation exploit privilege-escalation security
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-0920 vulnerability anywhere in the article.
-
TheCyberThrone
CISA KEV Catalog Update Part III- November 2024
The US CISA adds Microsoft, Metabase, Cisco, and Atlassian vulnerabilities to its Known Exploited Vulnerabilities Catalog based on the evidence of mass exploitation.CVE-2014-2120 Thr vulnerability wit ... Read more
-
TheCyberThrone
Cisco reveals no patch available for CVE-2024-20393 and CVE-2024-20470
Cisco has revealed multiple vulnerabilities impacting its Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers, which could potentially expose businesses to serious security r ... Read more
The following table lists the changes that have been made to the
CVE-2021-0920 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Added Reference https://source.android.com/security/bulletin/2021-11-01 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Feb. 02, 2024
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Third Party Advisory https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Mailing List, Third Party Advisory Added CWE NIST CWE-416 -
CWE Remap by [email protected]
Jul. 12, 2022
Action Type Old Value New Value Changed CWE CWE-362 CWE-416 CWE-362 -
Initial Analysis by [email protected]
Dec. 17, 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:H/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html Third Party Advisory Changed Reference Type https://source.android.com/security/bulletin/2021-11-01 No Types Assigned https://source.android.com/security/bulletin/2021-11-01 Vendor Advisory Added CWE NIST CWE-362 Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:google:android:*:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 17, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html [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-2021-0920 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-2021-0920
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} -0.01%
score
0.24559
percentile