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 cachepeer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peerdigest.cc mishandles EOF.
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{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "3.5.27-1ubuntu1.9", "binary_name": "squid" }, { "binary_version": "3.5.27-1ubuntu1.9", "binary_name": "squid-cgi" }, { "binary_version": "3.5.27-1ubuntu1.9", "binary_name": "squid-common" }, { "binary_version": "3.5.27-1ubuntu1.9", "binary_name": "squid-dbg" }, { "binary_version": "3.5.27-1ubuntu1.9", "binary_name": "squid-purge" }, { "binary_version": "3.5.27-1ubuntu1.9", "binary_name": "squid3" }, { "binary_version": "3.5.27-1ubuntu1.9", "binary_name": "squidclient" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squid" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squid-cgi" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squid-cgi-dbgsym" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squid-common" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squid-dbgsym" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squid-purge" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squid-purge-dbgsym" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squidclient" }, { "binary_version": "4.10-1ubuntu1.2", "binary_name": "squidclient-dbgsym" } ] }