USN-2916-1: Perl vulnerabilities

Ubuntu Security Notice USN-2916-1

2nd March, 2016

perl vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 15.10
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in Perl.

Software description

• perl - Practical Extraction and Report Language

Details

It was discovered that Perl incorrectly handled certain regular expressions
with an invalid backreference. An attacker could use this issue to cause
Perl to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2013-7422)

Markus Vervier discovered that Perl incorrectly handled nesting in the
Data::Dumper module. An attacker could use this issue to cause Perl to
consume memory and crash, resulting in a denial of service. (CVE-2014-4330)

Stephane Chazelas discovered that Perl incorrectly handled duplicate
environment variables. An attacker could possibly use this issue to bypass
the taint protection mechanism. (CVE-2016-2381)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 15.10:

perl 5.20.2-6ubuntu0.2

Ubuntu 14.04 LTS:

perl 5.18.2-2ubuntu1.1

Ubuntu 12.04 LTS:

perl 5.14.2-6ubuntu2.5

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-2013-7422, CVE-2014-4330, CVE-2016-2381