[ GLSA 200910-02 ] Pidgin: Multiple vulnerabilities

[GLSA]

Gentoo Linux Security Advisory

Title: Pidgin: Multiple vulnerabilities (GLSA 200910-02)
Severity: high
Exploitable: remote
Date: October 22, 2009
Bug(s): #276000, #281545, #283324
ID: 200910-02

Synopsis


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


Background


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


Affected Packages

Package: net-im/pidgin
Vulnerable: < 2.5.9-r1
Unaffected: >= 2.5.9-r1
Architectures: All supported architectures


Description


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


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


There is no known workaround at this time.


Resolution


All Pidgin users should upgrade to the latest version: