=========================================================================Ubuntu Security Notice USN-3625-2
April 17, 2018
perl vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in Perl.
Software Description:
- 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 ESM:
perl 5.14.2-6ubuntu2.7
In general, a standard system update will make all the necessary
changes.
References:
https://ubuntu.com/security/notices/USN-3625-2
https://ubuntu.com/security/notices/USN-3625-1
CVE-2015-8853, CVE-2016-6185, CVE-2017-6512, CVE-2018-6913
