Vulnerability CVE-2011-3594
Published: 2011-11-04   Modified: 2012-02-13

Description:
The g_markup_escape_text function in the SILC protocol plug-in in libpurple 2.10.0 and earlier, as used in Pidgin and possibly other products, allows remote attackers to cause a denial of service (crash) via invalid UTF-8 sequences that trigger use of invalid pointers and an out-of-bounds read, related to interactions with certain versions of glib2.

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

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:
https://bugzilla.redhat.com/show_bug.cgi?id=743481
http://www.redhat.com/support/errata/RHSA-2011-1371.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:183
http://secunia.com/advisories/46376
http://pidgin.im/news/security/?id=56
http://developer.pidgin.im/viewmtn/revision/diff/be5e66abad2af29604bc794cc4c6600ab12751f3/with/7eb1f6d56cc58bbb5b56b7df53955d36b9b419b8
http://developer.pidgin.im/ticket/14636
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