Vulnerability CVE-2011-2943
Published: 2011-08-29   Modified: 2012-02-13

Description:
The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response.

Type:

CWE-Other

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Pidgin -> Libpurple 
Pidgin -> Pidgin 

 References:
http://pidgin.im/news/security/?id=53
http://developer.pidgin.im/viewmtn/revision/info/5c2dba4a7e2e76b76e7f472b88953a4316706d43
http://developer.pidgin.im/viewmtn/revision/diff/5749f9193063800d27bef75c2388f6f9cc2f7f37/with/5c2dba4a7e2e76b76e7f472b88953a4316706d43/libpurple/protocols/irc/msgs.c
https://bugzilla.redhat.com/show_bug.cgi?id=722939
http://xforce.iss.net/xforce/xfdb/69340
http://www.securityfocus.com/bid/49268
http://www.openwall.com/lists/oss-security/2011/08/22/2
http://www.openwall.com/lists/oss-security/2011/08/20/2
http://securitytracker.com/id?1025961
http://secunia.com/advisories/45916
http://secunia.com/advisories/45663
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