Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using --with-openssl
are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.
{ "ubuntu_priority": "medium", "availability": "No subscription required", "binaries": [ { "binary_name": "squid", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-cgi", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-cgi-dbgsym", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-common", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-dbgsym", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-openssl", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-openssl-dbgsym", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-purge", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squid-purge-dbgsym", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squidclient", "binary_version": "5.7-0ubuntu0.22.04.2" }, { "binary_name": "squidclient-dbgsym", "binary_version": "5.7-0ubuntu0.22.04.2" } ] }
{ "ubuntu_priority": "medium", "availability": "No subscription required", "binaries": [ { "binary_name": "squid", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-cgi", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-cgi-dbgsym", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-common", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-dbgsym", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-openssl", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-openssl-dbgsym", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-purge", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squid-purge-dbgsym", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squidclient", "binary_version": "6.1-2ubuntu2" }, { "binary_name": "squidclient-dbgsym", "binary_version": "6.1-2ubuntu2" } ] }