1. Ubuntu Security Notices
  2. USN-1643-1

USN-1643-1: Perl vulnerabilities

Publication date

30 November 2012

Overview

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

Releases

Packages

  • 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 into
responses from applications that...

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 into
responses from applications that use CGI.pm. (CVE-2012-5526)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
8.04 hardy perl –  5.8.8-12ubuntu0.7
12.10 quantal perl –  5.14.2-13ubuntu0.1
12.04 precise perl –  5.14.2-6ubuntu2.2
11.10 oneiric perl –  5.12.4-4ubuntu0.1
10.04 lucid perl –  5.10.1-8ubuntu2.2

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References

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