[USN-3834-2] Perl vulnerabilities

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Ubuntu Security Notice USN-3834-2
December 03, 2018

perl vulnerabilities
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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-3834-1 fixed a vulnerability in perl. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Jayakrishna Menon discovered that Perl incorrectly handled
 Perl_my_setenv. An attacker could use this issue to cause Perl to
 crash, resulting in a denial of service, or possibly execute arbitrary
 code. (CVE-2018-18311)

 Eiichi Tsukata 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. (CVE-2018-18313)

Update instructions:

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

Ubuntu 12.04 ESM:
  perl                            5.14.2-6ubuntu2.9

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

References:
  https://usn.ubuntu.com/usn/usn-3834-2
  https://usn.ubuntu.com/usn/usn-3834-1
  CVE-2018-18311, CVE-2018-18313