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AUSCERT External Security Bulletin Redistribution
ESB-2018.0360
Squid vulnerabilities
6 February 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: squid3
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-1000027 CVE-2018-1000024 CVE-2016-3948
CVE-2016-2571 CVE-2016-2570 CVE-2016-2569
Reference: ASB-2016.0042
ESB-2016.0727
ESB-2016.0487.2
Original Bulletin:
http://www.ubuntu.com/usn/usn-3557-1
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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 Rincon 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.
References
CVE-2016-2569, CVE-2016-2570, CVE-2016-2571, CVE-2016-3948, CVE-2018-1000024,
CVE-2018-1000027
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