USN-3557-1 fixed vulnerabilities in Squid. This update introduced a regression which could cause the cache log to be filled with many Vary loop messages. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
Mathias Fischer discovered that Squid incorrectly handled certain long strings in headers. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. This issue was only addressed in Ubuntu 16.04 LTS. (CVE-2016-2569)
William Lima discovered that Squid incorrectly handled XML parsing when processing Edge Side Includes (ESI). A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. This issue was only addressed in Ubuntu 16.04 LTS. (CVE-2016-2570)
Alex Rousskov discovered that Squid incorrectly handled response-parsing failures. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. This issue only applied to Ubuntu 16.04 LTS. (CVE-2016-2571)
Santiago Ruano Rincón discovered that Squid incorrectly handled certain Vary headers. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service. This issue was only addressed in Ubuntu 16.04 LTS. (CVE-2016-3948)
Louis Dion-Marcil discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. (CVE-2018-1000024)
Louis Dion-Marcil discovered that Squid incorrectly handled certain Edge Side Includes (ESI) responses. A malicious remote server could possibly cause Squid to crash, resulting in a denial of service. (CVE-2018-1000027)
{
"binaries": [
{
"binary_version": "3.5.12-1ubuntu7.16+esm1",
"binary_name": "squid"
},
{
"binary_version": "3.5.12-1ubuntu7.16+esm1",
"binary_name": "squid-cgi"
},
{
"binary_version": "3.5.12-1ubuntu7.16+esm1",
"binary_name": "squid-common"
},
{
"binary_version": "3.5.12-1ubuntu7.16+esm1",
"binary_name": "squid-purge"
},
{
"binary_version": "3.5.12-1ubuntu7.16+esm1",
"binary_name": "squid3"
},
{
"binary_version": "3.5.12-1ubuntu7.16+esm1",
"binary_name": "squidclient"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}