Perl: Execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200805-17 / perl libperl
Release Date	May 20, 2008
Latest Revision	May 20, 2008: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-lang/perl	< 5.8.8-r5	>= 5.8.8-r5	All supported architectures
sys-devel/libperl	< 5.8.8-r2	>= 5.8.8-r2	All supported architectures

Related bugreports: #219203

Synopsis

A double free vulnerability was discovered in Perl, possibly resulting in the execution of arbitrary code and a Denial of Service.

2. Impact Information

Background

Perl is a stable, cross platform programming language.

Description

Tavis Ormandy and Will Drewry of the Google Security Team have reported a double free vulnerability when processing a crafted regular expression containing UTF-8 characters.

Impact

A remote attacker could possibly exploit this vulnerability to execute arbitrary code or cause a Denial of Service.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Perl users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/perl-5.8.8-r5"

All libperl users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-devel/libperl-5.8.8-r2"

4. References

CVE-2008-1927

Updated May 20, 2008

Summary: This is a Gentoo Linux Security Advisory

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