Ubuntu 15.10: 2916-1 Moderate Vulnerability in Perl Denial of Service

ubuntu

March 2, 2016

Several security issues were fixed in Perl.

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)

Topics Covered

security advisory moderate denial of service perl ubuntu

Update Instructions

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

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

In general, a standard system update will make all the necessary changes.