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Category:   Application (Generic)  >   Perl Vendors:   Wall, Larry
(Red Hat Issues Fix) Perl Digest->new() Input Validation Flaw Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1026401
SecurityTracker URL:  http://securitytracker.com/id/1026401
CVE Reference:   CVE-2011-3597   (Links to External Site)
Date:  Dec 9 2011
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Digest Module prior to 1.17
Description:   A vulnerability was reported in Perl. A remote user can execute arbitrary code on the target system.

The perl Digest module's Digest->new() function does not properly validate input. A remote user can supply specially crafted data to execute arbitrary code on the target system.

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2011-1797.html

Vendor URL:  perl.org/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  4, 5

Message History:   This archive entry is a follow-up to the message listed below.
Nov 23 2011 Perl Digest->new() Input Validation Flaw Lets Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2011:1797-01] Moderate: perl security update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: perl security update
Advisory ID:       RHSA-2011:1797-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-1797.html
Issue date:        2011-12-08
CVE Names:         CVE-2010-2761 CVE-2010-4410 CVE-2011-3597 
=====================================================================

1. Summary:

Updated perl packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 4 and 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Description:

Perl is a high-level programming language commonly used for system
administration utilities and web programming.

It was found that the "new" constructor of the Digest module used its
argument as part of the string expression passed to the eval() function. An
attacker could possibly use this flaw to execute arbitrary Perl code with
the privileges of a Perl program that uses untrusted input as an argument
to the constructor. (CVE-2011-3597)

It was found that the Perl CGI module used a hard-coded value for the MIME
boundary string in multipart/x-mixed-replace content. A remote attacker
could possibly use this flaw to conduct an HTTP response splitting attack
via a specially-crafted HTTP request. (CVE-2010-2761)

A CRLF injection flaw was found in the way the Perl CGI module processed a
sequence of non-whitespace preceded by newline characters in the header. A
remote attacker could use this flaw to conduct an HTTP response splitting
attack via a specially-crafted sequence of characters provided to the CGI
module. (CVE-2010-4410)

All Perl users should upgrade to these updated packages, which contain
backported patches to correct these issues. All running Perl programs must
be restarted for this update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

658976 - perl-CGI, perl-CGI-Simple: CVE-2010-2761 - hardcoded MIME boundary value for multipart content, CVE-2010-4410 - CRLF injection allowing HTTP response splitting
743010 - CVE-2011-3597 Perl Digest improper control of generation of code

6. Package List:

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/perl-5.8.5-57.el4.src.rpm

i386:
perl-5.8.5-57.el4.i386.rpm
perl-debuginfo-5.8.5-57.el4.i386.rpm
perl-suidperl-5.8.5-57.el4.i386.rpm

ia64:
perl-5.8.5-57.el4.ia64.rpm
perl-debuginfo-5.8.5-57.el4.ia64.rpm
perl-suidperl-5.8.5-57.el4.ia64.rpm

ppc:
perl-5.8.5-57.el4.ppc.rpm
perl-debuginfo-5.8.5-57.el4.ppc.rpm
perl-suidperl-5.8.5-57.el4.ppc.rpm

s390:
perl-5.8.5-57.el4.s390.rpm
perl-debuginfo-5.8.5-57.el4.s390.rpm
perl-suidperl-5.8.5-57.el4.s390.rpm

s390x:
perl-5.8.5-57.el4.s390x.rpm
perl-debuginfo-5.8.5-57.el4.s390x.rpm
perl-suidperl-5.8.5-57.el4.s390x.rpm

x86_64:
perl-5.8.5-57.el4.x86_64.rpm
perl-debuginfo-5.8.5-57.el4.x86_64.rpm
perl-suidperl-5.8.5-57.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/perl-5.8.5-57.el4.src.rpm

i386:
perl-5.8.5-57.el4.i386.rpm
perl-debuginfo-5.8.5-57.el4.i386.rpm
perl-suidperl-5.8.5-57.el4.i386.rpm

x86_64:
perl-5.8.5-57.el4.x86_64.rpm
perl-debuginfo-5.8.5-57.el4.x86_64.rpm
perl-suidperl-5.8.5-57.el4.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/perl-5.8.5-57.el4.src.rpm

i386:
perl-5.8.5-57.el4.i386.rpm
perl-debuginfo-5.8.5-57.el4.i386.rpm
perl-suidperl-5.8.5-57.el4.i386.rpm

ia64:
perl-5.8.5-57.el4.ia64.rpm
perl-debuginfo-5.8.5-57.el4.ia64.rpm
perl-suidperl-5.8.5-57.el4.ia64.rpm

x86_64:
perl-5.8.5-57.el4.x86_64.rpm
perl-debuginfo-5.8.5-57.el4.x86_64.rpm
perl-suidperl-5.8.5-57.el4.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/perl-5.8.5-57.el4.src.rpm

i386:
perl-5.8.5-57.el4.i386.rpm
perl-debuginfo-5.8.5-57.el4.i386.rpm
perl-suidperl-5.8.5-57.el4.i386.rpm

ia64:
perl-5.8.5-57.el4.ia64.rpm
perl-debuginfo-5.8.5-57.el4.ia64.rpm
perl-suidperl-5.8.5-57.el4.ia64.rpm

x86_64:
perl-5.8.5-57.el4.x86_64.rpm
perl-debuginfo-5.8.5-57.el4.x86_64.rpm
perl-suidperl-5.8.5-57.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/perl-5.8.8-32.el5_7.6.src.rpm

i386:
perl-5.8.8-32.el5_7.6.i386.rpm
perl-debuginfo-5.8.8-32.el5_7.6.i386.rpm
perl-suidperl-5.8.8-32.el5_7.6.i386.rpm

x86_64:
perl-5.8.8-32.el5_7.6.i386.rpm
perl-5.8.8-32.el5_7.6.x86_64.rpm
perl-debuginfo-5.8.8-32.el5_7.6.i386.rpm
perl-debuginfo-5.8.8-32.el5_7.6.x86_64.rpm
perl-suidperl-5.8.8-32.el5_7.6.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/perl-5.8.8-32.el5_7.6.src.rpm

i386:
perl-5.8.8-32.el5_7.6.i386.rpm
perl-debuginfo-5.8.8-32.el5_7.6.i386.rpm
perl-suidperl-5.8.8-32.el5_7.6.i386.rpm

ia64:
perl-5.8.8-32.el5_7.6.ia64.rpm
perl-debuginfo-5.8.8-32.el5_7.6.ia64.rpm
perl-suidperl-5.8.8-32.el5_7.6.ia64.rpm

ppc:
perl-5.8.8-32.el5_7.6.ppc.rpm
perl-debuginfo-5.8.8-32.el5_7.6.ppc.rpm
perl-suidperl-5.8.8-32.el5_7.6.ppc.rpm

s390x:
perl-5.8.8-32.el5_7.6.s390x.rpm
perl-debuginfo-5.8.8-32.el5_7.6.s390x.rpm
perl-suidperl-5.8.8-32.el5_7.6.s390x.rpm

x86_64:
perl-5.8.8-32.el5_7.6.x86_64.rpm
perl-debuginfo-5.8.8-32.el5_7.6.x86_64.rpm
perl-suidperl-5.8.8-32.el5_7.6.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-2761.html
https://www.redhat.com/security/data/cve/CVE-2010-4410.html
https://www.redhat.com/security/data/cve/CVE-2011-3597.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.
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