USN-3625-2: Perl vulnerabilities

17 April 2018

Several security issues were fixed in Perl.

Releases

Packages

  • perl - Practical Extraction and Report Language

Details

USN-3625-1 fixed a vulnerability in Perl. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

It was discovered that Perl incorrectly handled certain regular
expressions. An attacker could possibly use this issue to cause Perl to
hang, resulting in a denial of service. (CVE-2015-8853)

It was discovered that Perl incorrectly loaded libraries from the current
working directory. A local attacker could possibly use this issue to
execute arbitrary code. (CVE-2016-6185)

It was discovered that Perl incorrectly handled the rmtree and remove_tree
functions. A local attacker could possibly use this issue to set the mode
on arbitrary files. (CVE-2017-6512)

GwanYeong Kim discovered that Perl incorrectly handled certain data when
using the pack function. An attacker could use this issue to cause Perl to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2018-6913)

Update instructions

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

Ubuntu 12.04

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

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