USN-4289-1: Squid vulnerabilities
squid, squid3 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Squid.
Software Description
- squid – Web proxy cache server
- squid3 – Web proxy cache server
Details
Jeriko One discovered that Squid incorrectly handled memory when connected
to an FTP server. A remote attacker could possibly use this issue to obtain
sensitive information from Squid memory. (CVE-2019-12528)
Regis Leroy discovered that Squid incorrectly handled certain HTTP
requests. A remote attacker could possibly use this issue to access server
reources prohibited by earlier security filters. (CVE-2020-8449)
Guido Vranken discovered that Squid incorrectly handled certain buffer
operations when acting as a reverse proxy. A remote attacker could use
this issue to cause Squid to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2020-8450)
Aaron Costello discovered that Squid incorrectly handled certain NTLM
authentication credentials. A remote attacker could possibly use this issue
to cause Squid to crash, resulting in a denial of service. (CVE-2020-8517)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.10
- squid – 4.8-1ubuntu2.2
- Ubuntu 18.04 LTS
- squid – 3.5.27-1ubuntu1.5
- Ubuntu 16.04 LTS
- squid – 3.5.12-1ubuntu7.10
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.
References
Source: USN-4289-1: Squid vulnerabilities
