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Ubuntu Security Notice USN-3625-1.tt

Ubuntu Security Notice USN-3625-1.tt
Posted Apr 16, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3625-1 - 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. This issue only affected Ubuntu 14.04 LTS. 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. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, local, perl
systems | linux, ubuntu
advisories | CVE-2015-8853, CVE-2016-6185, CVE-2017-6512, CVE-2018-6797, CVE-2018-6798, CVE-2018-6913
MD5 | 73d95215fd2d3d7d29dd0162fd926131

Ubuntu Security Notice USN-3625-1.tt

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3625-1
April 16, 2018

perl 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 Perl.

Software Description:
- perl: Practical Extraction and Report Language

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. This issue only affected Ubuntu
14.04 LTS. (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. This issue only affected Ubuntu 14.04 LTS and
Ubuntu 16.04 LTS. (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. This issue only affected Ubuntu 14.04 LTS and Ubuntu
16.04 LTS. (CVE-2017-6512)

Brian Carpenter discovered that Perl incorrectly handled certain regular
expressions. An attacker could use this issue to cause Perl to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue has only been addressed in Ubuntu 16.04 LTS and Ubuntu 17.10.
(CVE-2018-6797)

Nguyen Duc Manh discovered that Perl incorrectly handled certain regular
expressions. An attacker could use this issue to cause Perl to crash,
resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS
and Ubuntu 17.10. (CVE-2018-6798)

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 17.10:
perl 5.26.0-8ubuntu1.1

Ubuntu 16.04 LTS:
perl 5.22.1-9ubuntu0.3

Ubuntu 14.04 LTS:
perl 5.18.2-2ubuntu1.4

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

References:
https://usn.ubuntu.com/usn/usn-3625-1
CVE-2015-8853, CVE-2016-6185, CVE-2017-6512, CVE-2018-6797,
CVE-2018-6798, CVE-2018-6913

Package Information:
https://launchpad.net/ubuntu/+source/perl/5.26.0-8ubuntu1.1
https://launchpad.net/ubuntu/+source/perl/5.22.1-9ubuntu0.3
https://launchpad.net/ubuntu/+source/perl/5.18.2-2ubuntu1.4

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