Description
Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem cannot be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.
References (5)
Core 5
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7c
X_Refsource_Misc x_refsource_misc
https://github.com/squid-cache/squid/pull/2220
X_Refsource_Misc x_refsource_misc
https://github.com/squid-cache/squid/pull/2220#discussion_r2727683637
X_Refsource_Misc x_refsource_misc
https://github.com/squid-cache/squid/commit/8138e909d2058d4401e0ad49b583afaec912b165
Scores
CVSS v3
6.5
EPSS
0.0124
EPSS Percentile
65.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-125
CWE-1289
Status
published
Products (1)
squid-cache/squid
< 7.5 (2 CPE variants)
Published
Mar 26, 2026
Tracked Since
Mar 26, 2026