CVE-2023-50269

SQUID-2023:10 Denial of Service in HTTP Request parsing

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Squid es un proxy de almacenamiento en caché para la Web. Debido a un error de recursión no controlada en las versiones 2.6 a 2.7.STABLE9, versiones 3.1 a 5.9 y versiones 6.0.1 a 6.5, Squid puede ser vulnerable a un ataque de denegación de servicio contra el análisis de solicitudes HTTP. Este problema permite que un cliente remoto realice un ataque de denegación de servicio enviando un encabezado X-Forwarded-For grande cuando la función follow_x_forwarded_for está configurada. Este error se solucionó con la versión 6.6 de Squid. Además, los parches que solucionan este problema para las versiones estables se pueden encontrar en los archivos de parches de Squid.

A flaw was found in Squid, which is susceptible to a Denial of Service (DoS) due to an Uncontrolled Recursion bug, specifically targeting HTTP Request parsing. Exploiting this issue involves a remote client initiating a DoS attack by sending an oversized X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This issue poses a threat to the stability and availability of the Squid service.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-12-05 CVE Reserved
2023-12-14 CVE Published
2024-01-24 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-674: Uncontrolled Recursion

CAPEC

References (9)

URL	Tag	Source
http://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch	Broken Link
http://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch	Broken Link
https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC
https://security.netapp.com/advisory/ntap-20240119-0005

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2023-50269	2024-04-11
https://bugzilla.redhat.com/show_bug.cgi?id=2254663	2024-04-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				>= 3.1 <= 5.9 Search vendor "Squid-cache" for product "Squid" and version " >= 3.1 <= 5.9"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				>= 6.0.1 <= 6.5 Search vendor "Squid-cache" for product "Squid" and version " >= 6.0.1 <= 6.5"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.6 Search vendor "Squid-cache" for product "Squid" and version "2.6"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable1		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable2		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable3		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable4		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable5		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable6		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable7		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable8		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				2.7 Search vendor "Squid-cache" for product "Squid" and version "2.7"		stable9		Affected