USN-3834-1: Perl vulnerabilities

3 December 2018

perl vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • 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

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, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2018-18312)

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)

Jakub Wilk 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, Ubuntu 18.04 LTS, and Ubuntu 18.10. (CVE-2018-18314)

Update instructions

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

Ubuntu 18.10
perl - 5.26.2-7ubuntu0.1
Ubuntu 18.04 LTS
perl - 5.26.1-6ubuntu0.3
Ubuntu 16.04 LTS
perl - 5.22.1-9ubuntu0.6
Ubuntu 14.04 LTS
perl - 5.18.2-2ubuntu1.7

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References