CVE-2021-20276
Firefox PCRE Denial of Service
Description
A flaw was found in privoxy before 3.0.32. Invalid memory access with an invalid pattern passed to pcre_compile() may lead to denial of service.
INFO
Published Date :
March 9, 2021, 2:15 p.m.
Last Modified :
Nov. 21, 2024, 5:46 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-20276 has a 1 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-2021-20276.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1936668 | Issue Tracking Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/03/msg00009.html | Third Party Advisory |
| https://security.gentoo.org/glsa/202107-16 | Third Party Advisory |
| https://www.privoxy.org/announce.txt | Release Notes Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1936668 | Issue Tracking Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/03/msg00009.html | Third Party Advisory |
| https://security.gentoo.org/glsa/202107-16 | Third Party Advisory |
| https://www.privoxy.org/announce.txt | Release Notes 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).
A heavily edited version of Privoxy intended for fuzzing.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-20276 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-20276 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://bugzilla.redhat.com/show_bug.cgi?id=1936668 Added Reference https://lists.debian.org/debian-lts-announce/2021/03/msg00009.html Added Reference https://security.gentoo.org/glsa/202107-16 Added Reference https://www.privoxy.org/announce.txt -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Aug. 05, 2022
Action Type Old Value New Value Removed CWE NIST CWE-119 Added CWE NIST NVD-CWE-noinfo -
Modified Analysis by [email protected]
Dec. 07, 2021
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202107-16 No Types Assigned https://security.gentoo.org/glsa/202107-16 Third Party Advisory Added CWE NIST CWE-119 -
CVE Modified by [email protected]
Jul. 08, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202107-16 [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 10, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1936668 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1936668 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/03/msg00009.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/03/msg00009.html Third Party Advisory Changed Reference Type https://www.privoxy.org/announce.txt No Types Assigned https://www.privoxy.org/announce.txt Release Notes, Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:privoxy:privoxy:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.32 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 09, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/03/msg00009.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-2021-20276 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-2021-20276
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.24 }} 0.09%
score
0.61403
percentile