CVE-2023-50269
Squid Uncontrolled Recursion Denial of Service
Description
Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives.
INFO
Published Date :
Dec. 14, 2023, 6:15 p.m.
Last Modified :
Jan. 19, 2024, 4:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2023-50269 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-2023-50269.
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 detailed repository of vulnerabilities that I discovered in The Squid Caching Proxy.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-50269 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-50269 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 -
CVE Modified by [email protected]
Jan. 19, 2024
Action Type Old Value New Value Added Reference GitHub, Inc. https://security.netapp.com/advisory/ntap-20240119-0005/ [No types assigned] -
CVE Modified by [email protected]
Jan. 09, 2024
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html [No types assigned] -
CVE Modified by [email protected]
Dec. 29, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/ [No types assigned] -
Initial Analysis by [email protected]
Dec. 27, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch No Types Assigned http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch Broken Link Changed Reference Type http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch No Types Assigned http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch Broken Link Changed Reference Type https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3 No Types Assigned https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3 Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:squid-cache:squid:2.6:*:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:-:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable1:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable2:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable3:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable4:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable5:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable6:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable7:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable8:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:2.7:stable9:*:*:*:*:*:* *cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* versions from (including) 3.1 up to (including) 5.9 *cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* versions from (including) 6.0.1 up to (including) 6.5 -
CVE Received by [email protected]
Dec. 14, 2023
Action Type Old Value New Value Added Description Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Added Reference GitHub, Inc. https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3 [No types assigned] Added Reference GitHub, Inc. http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch [No types assigned] Added Reference GitHub, Inc. http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch [No types assigned] Added CWE GitHub, Inc. CWE-674 Added CVSS V3.1 GitHub, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-50269 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-2023-50269
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.40 }} -0.05%
score
0.74247
percentile