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CVE-2023-46728

HIGH

7.5

Description

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published11/6/2023

Last Modified11/3/2025

Sourcenvd

Honeypot Sightings0

Affected Products

squid-cache:squid

Weaknesses (CWE)

CWE-476

References

https://github.com/squid-cache/squid/commit/6ea12e8fb590ac6959e9356a81aa3370576568c3(security-advisories@github.com)

https://github.com/squid-cache/squid/security/advisories/GHSA-cg5h-v6vc-w33f(security-advisories@github.com)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/(security-advisories@github.com)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/(security-advisories@github.com)

https://security.netapp.com/advisory/ntap-20231214-0006/(security-advisories@github.com)

https://github.com/squid-cache/squid/commit/6ea12e8fb590ac6959e9356a81aa3370576568c3(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/squid-cache/squid/security/advisories/GHSA-cg5h-v6vc-w33f(af854a3a-2127-422b-91ae-364da2661108)

https://lists.debian.org/debian-lts-announce/2025/09/msg00027.html(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/(af854a3a-2127-422b-91ae-364da2661108)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20231214-0006/(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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