VulnerabilityModified

CVE-2023-46728

Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway.

HIGH 7.5EPSS 5.96%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (5.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 5.96% probability · 93th percentile
CISA KEV: Not listed
Weakness: CWE-476
Affected: squid-cache/squid
Source: security-advisories@github.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.