Synopsis:	Moderate: perl security update
Issue date:	2010-06-07
CVE Names:	CVE-2008-5302 CVE-2008-5303 CVE-2010-1168
                   CVE-2010-1447


Perl is a high-level programming language commonly used for system
administration utilities and web programming. The Safe extension module
allows users to compile and execute Perl code in restricted 
compartments. The File::Path module allows users to create and remove 
directory trees.

The Safe module did not properly restrict the code of implicitly called
methods (such as DESTROY and AUTOLOAD) on implicitly blessed objects
returned as a result of unsafe code evaluation. These methods could have
been executed unrestricted by Safe when such objects were accessed or
destroyed. A specially-crafted Perl script executed inside of a Safe
compartment could use this flaw to bypass intended Safe module
restrictions. (CVE-2010-1168)

The Safe module did not properly restrict code compiled in a Safe
compartment and executed out of the compartment via a subroutine 
reference returned as a result of unsafe code evaluation. A 
specially-crafted Perl script executed inside of a Safe compartment 
could use this flaw to bypass intended Safe module restrictions, if the 
returned subroutine reference was called from outside of the 
compartment. (CVE-2010-1447)

Multiple race conditions were found in the way the File::Path module's
rmtree function removed directory trees. A malicious, local user with 
write access to a directory being removed by a victim, running a Perl 
script using rmtree, could cause the permissions of arbitrary files to 
be changed to world-writable and setuid, or delete arbitrary files via a 
symbolic link attack, if the victim had the privileges to change the 
permissions of the target files or to remove them. (CVE-2008-5302, 
CVE-2008-5303)


These packages upgrade the Safe extension module to version 2.27. Refer 
to the Safe module's Changes file at the following link for a full list 
of changes.
http://cpansearch.perl.org/src/RGARCIA/Safe-2.27/Changes

All applications using the Safe or File::Path modules must be restarted 
for this update to take effect.

NOTE: SL 50-52 x86_64 releases originally had a perl.i386 package.  It 
was taken out of the x86_64 SL5 distribution and is not part of this 
security update.  If you have one of these earlier SL5 x86_64 
distributions and your perl update does not work due to conflicts, you 
should do a "yum remove perl.i386" before doing your update on these 
earlier SL 5 x86_64 releases.

SL 5.x

     SRPMS:
perl-5.8.8-32.el5_5.1.src.rpm
     i386:
perl-5.8.8-32.el5_5.1.i386.rpm
perl-suidperl-5.8.8-32.el5_5.1.i386.rpm
     x86_64:
perl-5.8.8-32.el5_5.1.x86_64.rpm
perl-suidperl-5.8.8-32.el5_5.1.x86_64.rpm

-Connie Sieh
-Troy Dawson