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Category:   Application (Instant Messaging/IRC/Chat)  >   Pidgin Vendors:   pidgin.im
(Red Hat Issues Fix) Pidgin Integer Overflow in msn_slplink_process_msg() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1020454
SecurityTracker URL:  http://securitytracker.com/id/1020454
CVE Reference:   CVE-2008-2927   (Links to External Site)
Date:  Jul 9 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.4.3
Description:   A vulnerability was reported in Pidgin. A remote user can execute arbitrary code on the target system.

A remote user can send a specially crafted SLP message to trigger an integer overflow in the MSN protocol handler and execute arbitrary code on the target user's system. The code will run with the privileges of the target user.

The overflows reside in 'libpurple/protocols/msn/slplink.c' and 'libpurple/protocols/msnp9/slplink.c'.

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

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2008-0584.html

Vendor URL:  pidgin.im/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  3, 4, 5

Message History:   This archive entry is a follow-up to the message listed below.
Jul 9 2008 Pidgin Integer Overflow in msn_slplink_process_msg() Lets Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2008:0584-01] Important: pidgin security and bug fix update


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

Synopsis:          Important: pidgin security and bug fix update
Advisory ID:       RHSA-2008:0584-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0584.html
Issue date:        2008-07-09
CVE Names:         CVE-2008-2927 
=====================================================================

1. Summary:

Updated Pidgin packages that fix a security issue and address a bug are now
available for Red Hat Enterprise Linux 3, 4, and 5.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, 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
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
RHEL Optional Productivity Applications (v. 5 server) - i386, x86_64

3. Description:

Pidgin is a multi-protocol Internet Messaging client.

An integer overflow flaw was found in Pidgin's MSN protocol handler. If a
user received a malicious MSN message, it was possible to execute arbitrary
code with the permissions of the user running Pidgin. (CVE-2008-2927)

Note: the default Pidgin privacy setting only allows messages from users in
the buddy list. This prevents arbitrary MSN users from exploiting this
flaw.

This update also addresses the following bug:

* when attempting to connect to the ICQ network, Pidgin would fail to
connect, present an alert saying the "The client version you are using is
too old", and de-activate the ICQ account. This update restores Pidgin's
ability to connect to the ICQ network.

All Pidgin users should upgrade to these updated packages, which contain
backported patches to resolve these issues.

4. Solution:

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

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

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

453634 - RHEL5 - Fix ICQ login
453764 - CVE-2008-2927 pidgin MSN integer overflow
453773 - RHEL4 - Fix ICQ login
453774 - RHEL3 - Fix ICQ login

6. Package List:

Red Hat Enterprise Linux AS version 3:

Source:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/pidgin-1.5.1-2.el3.src.rpm

i386:
pidgin-1.5.1-2.el3.i386.rpm
pidgin-debuginfo-1.5.1-2.el3.i386.rpm

ia64:
pidgin-1.5.1-2.el3.ia64.rpm
pidgin-debuginfo-1.5.1-2.el3.ia64.rpm

ppc:
pidgin-1.5.1-2.el3.ppc.rpm
pidgin-debuginfo-1.5.1-2.el3.ppc.rpm

s390:
pidgin-1.5.1-2.el3.s390.rpm
pidgin-debuginfo-1.5.1-2.el3.s390.rpm

s390x:
pidgin-1.5.1-2.el3.s390x.rpm
pidgin-debuginfo-1.5.1-2.el3.s390x.rpm

x86_64:
pidgin-1.5.1-2.el3.x86_64.rpm
pidgin-debuginfo-1.5.1-2.el3.x86_64.rpm

Red Hat Desktop version 3:

Source:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/pidgin-1.5.1-2.el3.src.rpm

i386:
pidgin-1.5.1-2.el3.i386.rpm
pidgin-debuginfo-1.5.1-2.el3.i386.rpm

x86_64:
pidgin-1.5.1-2.el3.x86_64.rpm
pidgin-debuginfo-1.5.1-2.el3.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

Source:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/pidgin-1.5.1-2.el3.src.rpm

i386:
pidgin-1.5.1-2.el3.i386.rpm
pidgin-debuginfo-1.5.1-2.el3.i386.rpm

ia64:
pidgin-1.5.1-2.el3.ia64.rpm
pidgin-debuginfo-1.5.1-2.el3.ia64.rpm

x86_64:
pidgin-1.5.1-2.el3.x86_64.rpm
pidgin-debuginfo-1.5.1-2.el3.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

Source:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/pidgin-1.5.1-2.el3.src.rpm

i386:
pidgin-1.5.1-2.el3.i386.rpm
pidgin-debuginfo-1.5.1-2.el3.i386.rpm

ia64:
pidgin-1.5.1-2.el3.ia64.rpm
pidgin-debuginfo-1.5.1-2.el3.ia64.rpm

x86_64:
pidgin-1.5.1-2.el3.x86_64.rpm
pidgin-debuginfo-1.5.1-2.el3.x86_64.rpm

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/pidgin-1.5.1-2.el4.src.rpm

i386:
pidgin-1.5.1-2.el4.i386.rpm
pidgin-debuginfo-1.5.1-2.el4.i386.rpm

ia64:
pidgin-1.5.1-2.el4.ia64.rpm
pidgin-debuginfo-1.5.1-2.el4.ia64.rpm

ppc:
pidgin-1.5.1-2.el4.ppc.rpm
pidgin-debuginfo-1.5.1-2.el4.ppc.rpm

s390:
pidgin-1.5.1-2.el4.s390.rpm
pidgin-debuginfo-1.5.1-2.el4.s390.rpm

s390x:
pidgin-1.5.1-2.el4.s390x.rpm
pidgin-debuginfo-1.5.1-2.el4.s390x.rpm

x86_64:
pidgin-1.5.1-2.el4.x86_64.rpm
pidgin-debuginfo-1.5.1-2.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/pidgin-1.5.1-2.el4.src.rpm

i386:
pidgin-1.5.1-2.el4.i386.rpm
pidgin-debuginfo-1.5.1-2.el4.i386.rpm

x86_64:
pidgin-1.5.1-2.el4.x86_64.rpm
pidgin-debuginfo-1.5.1-2.el4.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/pidgin-1.5.1-2.el4.src.rpm

i386:
pidgin-1.5.1-2.el4.i386.rpm
pidgin-debuginfo-1.5.1-2.el4.i386.rpm

ia64:
pidgin-1.5.1-2.el4.ia64.rpm
pidgin-debuginfo-1.5.1-2.el4.ia64.rpm

x86_64:
pidgin-1.5.1-2.el4.x86_64.rpm
pidgin-debuginfo-1.5.1-2.el4.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/pidgin-1.5.1-2.el4.src.rpm

i386:
pidgin-1.5.1-2.el4.i386.rpm
pidgin-debuginfo-1.5.1-2.el4.i386.rpm

ia64:
pidgin-1.5.1-2.el4.ia64.rpm
pidgin-debuginfo-1.5.1-2.el4.ia64.rpm

x86_64:
pidgin-1.5.1-2.el4.x86_64.rpm
pidgin-debuginfo-1.5.1-2.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/pidgin-2.3.1-2.el5_2.src.rpm

i386:
finch-2.3.1-2.el5_2.i386.rpm
libpurple-2.3.1-2.el5_2.i386.rpm
libpurple-perl-2.3.1-2.el5_2.i386.rpm
libpurple-tcl-2.3.1-2.el5_2.i386.rpm
pidgin-2.3.1-2.el5_2.i386.rpm
pidgin-debuginfo-2.3.1-2.el5_2.i386.rpm
pidgin-perl-2.3.1-2.el5_2.i386.rpm

x86_64:
finch-2.3.1-2.el5_2.i386.rpm
finch-2.3.1-2.el5_2.x86_64.rpm
libpurple-2.3.1-2.el5_2.i386.rpm
libpurple-2.3.1-2.el5_2.x86_64.rpm
libpurple-perl-2.3.1-2.el5_2.x86_64.rpm
libpurple-tcl-2.3.1-2.el5_2.x86_64.rpm
pidgin-2.3.1-2.el5_2.i386.rpm
pidgin-2.3.1-2.el5_2.x86_64.rpm
pidgin-debuginfo-2.3.1-2.el5_2.i386.rpm
pidgin-debuginfo-2.3.1-2.el5_2.x86_64.rpm
pidgin-perl-2.3.1-2.el5_2.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/pidgin-2.3.1-2.el5_2.src.rpm

i386:
finch-devel-2.3.1-2.el5_2.i386.rpm
libpurple-devel-2.3.1-2.el5_2.i386.rpm
pidgin-debuginfo-2.3.1-2.el5_2.i386.rpm
pidgin-devel-2.3.1-2.el5_2.i386.rpm

x86_64:
finch-devel-2.3.1-2.el5_2.i386.rpm
finch-devel-2.3.1-2.el5_2.x86_64.rpm
libpurple-devel-2.3.1-2.el5_2.i386.rpm
libpurple-devel-2.3.1-2.el5_2.x86_64.rpm
pidgin-debuginfo-2.3.1-2.el5_2.i386.rpm
pidgin-debuginfo-2.3.1-2.el5_2.x86_64.rpm
pidgin-devel-2.3.1-2.el5_2.i386.rpm
pidgin-devel-2.3.1-2.el5_2.x86_64.rpm

RHEL Optional Productivity Applications (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/pidgin-2.3.1-2.el5_2.src.rpm

i386:
finch-2.3.1-2.el5_2.i386.rpm
finch-devel-2.3.1-2.el5_2.i386.rpm
libpurple-2.3.1-2.el5_2.i386.rpm
libpurple-devel-2.3.1-2.el5_2.i386.rpm
libpurple-perl-2.3.1-2.el5_2.i386.rpm
libpurple-tcl-2.3.1-2.el5_2.i386.rpm
pidgin-2.3.1-2.el5_2.i386.rpm
pidgin-debuginfo-2.3.1-2.el5_2.i386.rpm
pidgin-devel-2.3.1-2.el5_2.i386.rpm
pidgin-perl-2.3.1-2.el5_2.i386.rpm

x86_64:
finch-2.3.1-2.el5_2.i386.rpm
finch-2.3.1-2.el5_2.x86_64.rpm
finch-devel-2.3.1-2.el5_2.i386.rpm
finch-devel-2.3.1-2.el5_2.x86_64.rpm
libpurple-2.3.1-2.el5_2.i386.rpm
libpurple-2.3.1-2.el5_2.x86_64.rpm
libpurple-devel-2.3.1-2.el5_2.i386.rpm
libpurple-devel-2.3.1-2.el5_2.x86_64.rpm
libpurple-perl-2.3.1-2.el5_2.x86_64.rpm
libpurple-tcl-2.3.1-2.el5_2.x86_64.rpm
pidgin-2.3.1-2.el5_2.i386.rpm
pidgin-2.3.1-2.el5_2.x86_64.rpm
pidgin-debuginfo-2.3.1-2.el5_2.i386.rpm
pidgin-debuginfo-2.3.1-2.el5_2.x86_64.rpm
pidgin-devel-2.3.1-2.el5_2.i386.rpm
pidgin-devel-2.3.1-2.el5_2.x86_64.rpm
pidgin-perl-2.3.1-2.el5_2.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://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2927
http://www.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2008 Red Hat, Inc.
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