CVE-2023-49288

Denial of Service in HTTP Collapsed Forwarding in Squid

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.

Squid es un proxy de almacenamiento en caché para la Web que admite HTTP, HTTPS, FTP y más. Las versiones afectadas de squid están sujetas a un error Use-After-Free que puede provocar un ataque de denegación de servicio mediante reenvío colapsado. Todas las versiones de Squid desde la 3.5 hasta la 5.9 inclusive configuradas con "collapsed_forwarding on" son vulnerables. Las configuraciones con "collapsed_forwarding desactivado" o sin una directiva "collapsed_forwarding" no son vulnerables. Este error se solucionó con la versión 6.0.1 de Squid. Se recomienda a los usuarios que actualicen. Los usuarios que no puedan actualizar deben eliminar todas las líneas collapsed_forwarding de su squid.conf.

A flaw was found in Squid. The use of the HTTP Collapsed Forwarding configuration may allow an attacker to perform a denial of service remotely.

*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:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-11-24 CVE Reserved
2023-12-04 CVE Published
2024-10-15 CVE Updated
2024-11-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (6)

URL	Tag	Source
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-20240119-0006

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://github.com/squid-cache/squid/security/advisories/GHSA-rj5h-46j6-q2g5	2024-01-19
https://access.redhat.com/security/cve/CVE-2023-49288	2023-12-06
https://bugzilla.redhat.com/show_bug.cgi?id=2252918	2023-12-06

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"				>= 3.5 <= 5.9 Search vendor "Squid-cache" for product "Squid" and version " >= 3.5 <= 5.9"		-		Affected