Perl Safe module: Arbitrary Perl code injection

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201111-09 / Safe
Release Date	November 20, 2011
Latest Revision	November 20, 2011: 1
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
perl-core/Safe	< 2.27	>= 2.27	All supported architectures
virtual/perl-Safe	< 2.27	>= 2.27	All supported architectures

Related bugreports: #325563

Synopsis

The Safe module for Perl does not properly restrict code, allowing a remote attacker to execute arbitrary Perl code outside of a restricted compartment.

2. Impact Information

Background

Safe is a Perl module to compile and execute code in restricted compartments.

Description

Unsafe code evaluation prevents the Safe module from properly restricting the code of implicitly called methods on implicitly blessed objects.

Impact

A remote attacker could entice a user to load a specially crafted Perl script, resulting in execution arbitrary Perl code outside of a restricted compartment.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All users of the standalone Perl Safe module should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=perl-core/Safe-2.27"

All users of the Safe module bundled with Perl should upgrade to the latest version:

Code Listing 3.2: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=virtual/perl-Safe-2.27"

NOTE: This is a legacy GLSA. Updates for all affected architectures are available since July 18, 2010. It is likely that your system is already no longer affected by this issue.

4. References

CVE-2010-1168

Page updated November 20, 2011

Summary: This is a Gentoo Linux Security Advisory

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