CVE-2020-14059

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-30 · updated 2026-06-17
Weakness: CWE-662

Description

An issue was discovered in Squid 5.x before 5.0.3. Due to an Incorrect Synchronization, a Denial of Service can occur when processing objects in an SMP cache because of an Ipc::Mem::PageStack::pop ABA problem during access to the memory page/slot management list.

Affected products

Squid: from 5.0 before 5.0.3 — fixed in 5.0.3

How to fix

Upgrade to a fixed version: Squid 5.0.3. Check the vendor advisory for mitigations.

References

http://www.squid-cache.org/Advisories/SQUID-2020_5.txt
http://www.squid-cache.org/Versions/v5/changesets/squid-5-7a5af8db8e0377c06ed9ffbdcb1334389c7cd8ab.patch
https://security.netapp.com/advisory/ntap-20210312-0001/
http://www.squid-cache.org/Advisories/SQUID-2020_5.txt
http://www.squid-cache.org/Versions/v5/changesets/squid-5-7a5af8db8e0377c06ed9ffbdcb1334389c7cd8ab.patch
https://security.netapp.com/advisory/ntap-20210312-0001/

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