Squid 3.x before 3.5.15 and 4.x before 4.0.7 does not properly append data to String objects, which allows remote servers to cause a denial of service (assertion failure and daemon exit) via a long string, as demonstrated by a crafted HTTP Vary header.
{ "ubuntu_priority": "low", "availability": "No subscription required", "binaries": [ { "binary_name": "squid", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid-cgi", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid-cgi-dbgsym", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid-common", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid-dbg", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid-dbgsym", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid-purge", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid-purge-dbgsym", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squid3", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squidclient", "binary_version": "3.5.12-1ubuntu7.5" }, { "binary_name": "squidclient-dbgsym", "binary_version": "3.5.12-1ubuntu7.5" } ] }