The mod_perl Apache module is vulnerable to a Denial of Service when processing regular expressions.

Announced

2007-05-02

Revised

2007-05-02 (revision 2)

Access

remote

Bugs

#172676

Advisory

https://security.gentoo.org/glsa/200705-04

Affected packages

Package	Arch	Vulnerable	Unaffected
www-apache/mod_perl	*	< 2.0.3-r1	>= 2.0.3-r1, >= 1.30 (revision)

Background

Mod_perl is an Apache module that embeds the Perl interpreter within the server, allowing Perl-based web-applications to be created.

Description

Alex Solvey discovered that the "path_info" variable used in file RegistryCooker.pm (mod_perl 2.x) or file PerlRun.pm (mod_perl 1.x), is not properly escaped before being processed.

Impact

A remote attacker could send a specially crafted URL to the vulnerable server, possibly resulting in a massive resource consumption.

Workaround

There is no known workaround at this time.

Resolution

All mod_perl 1.x users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_perl-1.30"

All mod_perl 2.x users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_perl-2.0.3-r1"

References

• CVE-2007-1349