CVE-2023-46728

SQUID-2021:8 Denial of Service in Gopher gateway

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 supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.

Squid es un proxy de almacenamiento en caché para la Web que admite HTTP, HTTPS, FTP y más. Debido a un bug de desreferencia de NULL pointer, Squid es vulnerable a un ataque de Denegación de Servicio contra la puerta de enlace Gopher de Squid. El protocolo Gopher siempre está disponible y habilitado en Squid antes de Squid 6.0.1. Es posible recibir respuestas que desencadenen este error desde cualquier servidor Gopher, incluso aquellos sin intenciones maliciosas. La compatibilidad con Gopher se eliminó en la versión 6.0.1 de Squid. Se recomienda a los usuarios que actualicen. Los usuarios que no puedan actualizar deben rechazar todas las solicitudes de URL de Gopher.

*Credits: N/A

CVSS Scores

NISTv3.1 7.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-10-25 CVE Reserved
2023-11-06 CVE Published
2023-12-29 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (7)

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-20231214-0006

URL	Date	SRC

URL	Date	SRC
https://github.com/squid-cache/squid/commit/6ea12e8fb590ac6959e9356a81aa3370576568c3	2023-12-29

URL	Date	SRC
https://github.com/squid-cache/squid/security/advisories/GHSA-cg5h-v6vc-w33f	2023-12-29
https://access.redhat.com/security/cve/CVE-2023-46728	2024-04-11
https://bugzilla.redhat.com/show_bug.cgi?id=2248521	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"				< 6.0.1 Search vendor "Squid-cache" for product "Squid" and version " < 6.0.1"		-		Affected