USN-2916-1: Perl vulnerabilities

Releases

• Ubuntu 15.10
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• 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 versions:

Ubuntu 15.10

• perl - 5.20.2-6ubuntu0.2

Ubuntu 14.04

• perl - 5.18.2-2ubuntu1.1

Ubuntu 12.04

• perl - 5.14.2-6ubuntu2.5

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

References

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