// For flags

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

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*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.

*Credits: N/A
CVSS Scores
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
  • 2023-11-24 CVE Reserved
  • 2023-12-04 CVE Published
  • 2024-01-24 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-416: Use After Free
CAPEC
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