Ubuntu 12.10 Security Advisory: 1643-1 Critical Perl Code Risk

ubuntu

November 30, 2012

Perl programs could be made to crash or run programs if they receivespecially crafted network traffic or other input.

Summary

Perl programs could be made to crash or run programs if they receive

specially crafted network traffic or other input.

Software Description:

- perl: Larry Wall's Practical Extraction and Report Language

Details:

It was discovered that the decode_xs function in the Encode module is

vulnerable to a heap-based buffer overflow via a crafted Unicode string.

An attacker could use this overflow to cause a denial of service.

(CVE-2011-2939)

It was discovered that the 'new' constructor in the Digest module is

vulnerable to an eval injection. An attacker could use this to execute

arbitrary code. (CVE-2011-3597)

It was discovered that Perl's 'x' string repeat operator is vulnerable

to a heap-based buffer overflow. An attacker could use this to execute

arbitrary code. (CVE-2012-5195)

Ryo Anazawa discovered that the CGI.pm module does not properly escape

newlines in Set-Cookie or P3P (Platform for Privacy Preferences Project)

headers. An attacker could use this to inject arbitrary headers...

Read the Full Advisory

Topics Covered

security advisory denial of service critical perl ubuntu

Update Instructions

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

Ubuntu 12.10:
  perl                            5.14.2-13ubuntu0.1

Ubuntu 12.04 LTS:
  perl                            5.14.2-6ubuntu2.2

Ubuntu 11.10:
  perl                            5.12.4-4ubuntu0.1

Ubuntu 10.04 LTS:
  perl                            5.10.1-8ubuntu2.2

Ubuntu 8.04 LTS:
  perl                            5.8.8-12ubuntu0.7

Perl programs need to be restarted after a standard system update to
make all the necessary changes.