Perl: Buffer overflow — GLSA 200711-28

A buffer overflow in the Regular Expression engine in Perl possibly allows for the execution of arbitrary code.

Affected Packages

dev-lang/perl on all architectures
Affected versions < 5.8.8-r4
Unaffected versions >= 5.8.8-r4

Background

Perl is a stable, cross-platform programming language created by Larry Wall.

Description

Tavis Ormandy and Will Drewry (Google Security Team) discovered a heap-based buffer overflow in the Regular Expression engine (regcomp.c) that occurs when switching from byte to Unicode (UTF-8) characters in a regular expression.

Impact

A remote attacker could either entice a user to compile a specially crafted regular expression or actively compile it in case the script accepts remote input of regular expressions, possibly leading to the execution of arbitrary code with the privileges of the user running Perl.

Workaround

There is no known workaround at this time.

Resolution

All Perl users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-lang/perl-5.8.8-r4"

References

Release Date
November 19, 2007

Latest Revision
November 19, 2007: 01

Severity
normal

Exploitable
remote

Bugzilla entries