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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24606
Reference (s):
- https://security.netapp.com/advisory/ntap-20210219-0007/
- https://security.netapp.com/advisory/ntap-20210226-0006/
- https://security.netapp.com/advisory/ntap-20210226-0007/
- DEBIAN:DSA-4751
- URL: https://www.debian.org/security/2020/dsa-4751