A new security update has been released for Gentoo Linux - Pidgin: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200910-02
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http://security.gentoo.org/
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Severity: High
Title: Pidgin: Multiple vulnerabilities
Date: October 22, 2009
Bugs: #276000, #281545, #283324
ID: 200910-02

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Synopsis
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Multiple vulnerabilities have been discovered in Pidgin, leading to the
remote execution of arbitrary code, unauthorized information
disclosure, or Denial of Service.

Background
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Pidgin is a client for a variety of instant messaging protocols.

Affected packages
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Package / Vulnerable / Unaffected
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1 net-im/pidgin < 2.5.9-r1 >=3D 2.5.9-r1

Description
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Multiple vulnerabilities were found in Pidgin:

* Yuriy Kaminskiy reported that the OSCAR protocol implementation in
Pidgin misinterprets the ICQWebMessage message type as the ICQSMS
message type, triggering an allocation of a large amount of memory
(CVE-2009-1889).

* Federico Muttis of Core Security Technologies reported that the
msn_slplink_process_msg() function in
libpurple/protocols/msn/slplink.c in libpurple as used in Pidgin
doesn't properly process incoming SLP messages, triggering an
overwrite of an arbitrary memory location (CVE-2009-2694). NOTE: This
issue reportedly exists because of an incomplete fix for
CVE-2009-1376 (GLSA 200905-07).

* bugdave reported that protocols/jabber/auth.c in libpurple as used
in Pidgin does not follow the "require TSL/SSL" preference when
connecting to older Jabber servers that do not follow the XMPP
specification, resulting in a connection to the server without the
expected encryption (CVE-2009-3026).

Impact
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A remote attacker could send specially crafted SLP (via MSN) or ICQ web
messages, possibly leading to execution of arbitrary code with the
privileges of the user running Pidgin, unauthorized information
disclosure, or a Denial of Service.

Workaround
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There is no known workaround at this time.

Resolution
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All Pidgin users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose =3Dnet-im/pidgin-2.5.9-r1

References
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[ 1 ] CVE-2009-1376
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-1376
[ 2 ] CVE-2009-1889
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-1889
[ 3 ] CVE-2009-2694
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-2694
[ 4 ] CVE-2009-3026
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-3026
[ 5 ] GLSA 200905-07
http://www.gentoo.org/security/en/glsa/glsa-200905-07.xml

Availability
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This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200910-02.xml

Concerns?
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Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
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Copyright 2009 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5