USN-3557-1: Squid vulnerabilities
Ubuntu Security Notice USN-3557-1
5th February, 2018
squid3 vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
Several security issues were fixed in Squid.
Software description
- squid3
– Web proxy cache server
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)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 17.10:
-
squid3
3.5.23-5ubuntu1.1
- Ubuntu 16.04 LTS:
-
squid3
3.5.12-1ubuntu7.5
- Ubuntu 14.04 LTS:
-
squid3
3.3.8-1ubuntu6.11
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.