{"cve":"CVE-2020-24606","nvd":{"published":"2020-08-24T18:15:10.047","modified":"2026-06-17T03:05:51.130","status":"Modified","description":"Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response message. This only occurs when cache_peer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peer_digest.cc mishandles EOF.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-667"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html","http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html","http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_9.patch","https://github.com/squid-cache/squid/security/advisories/GHSA-vvj7-xjgq-g2jg","https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html"],"products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","opensuse:leap","squid-cache:squid"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-24606","score":0.04961,"percentile":0.92184,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}