ESB-2018.0360 - [Ubuntu] squid3: Denial of service - Remote with user interaction 2018-02-06

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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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