RHEL 5 : perl (RHSA-2010:0458)

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Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated perl packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
moderate security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.

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)

Red Hat would like to thank Tim Bunce for responsibly reporting the
CVE-2010-1168 and CVE-2010-1447 issues. Upstream acknowledges Nick
Cleaton as the original reporter of CVE-2010-1168, and Tim Bunce and
Rafaël Garcia-Suarez as the original reporters of CVE-2010-1447.

These packages upgrade the Safe extension module to version 2.27.
Refer to the Safe module's Changes file, linked to in the References,
for a full list of changes.

Users of perl are advised to upgrade to these updated packages, which
correct these issues. All applications using the Safe or File::Path
modules must be restarted for this update to take effect.

See also :

https://www.redhat.com/security/data/cve/CVE-2008-5302.html
https://www.redhat.com/security/data/cve/CVE-2008-5303.html
https://www.redhat.com/security/data/cve/CVE-2010-1168.html
https://www.redhat.com/security/data/cve/CVE-2010-1447.html
http://cpansearch.perl.org/src/RGARCIA/Safe-2.27/Changes
http://rhn.redhat.com/errata/RHSA-2010-0458.html

Solution :

Update the affected perl and / or perl-suidperl packages.

Risk factor :

High / CVSS Base Score : 8.5
(CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C)
CVSS Temporal Score : 7.4
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 46834 ()

Bugtraq ID: 12767
40302
40305

CVE ID: CVE-2008-5302
CVE-2008-5303
CVE-2010-1168
CVE-2010-1447