Buffer overflow in pidgin.im libpurple

1) Buffer overflow

EUVDB-ID: #VU44545

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-3594

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libpurple: 1.0 - 2.9.0

CPE2.3

• cpe:2.3::pidgin_im:libpurple:1.0:*:*:*:*:*:*:*
• cpe:2.3::pidgin_im:libpurple:2.0.0:*:*:*:*:*:*:*
• cpe:2.3::pidgin_im:libpurple:2.0.1:*:*:*:*:*:*:*

External links

https://developer.pidgin.im/ticket/14636
https://developer.pidgin.im/viewmtn/revision/diff/be5e66abad2af29604bc794cc4c6600ab12751f3/with/7eb1f6d56cc58bbb5b56b7df53955d36b9b419b8
https://pidgin.im/news/security/?id=56
https://secunia.com/advisories/46376
https://www.mandriva.com/security/advisories?name=MDVSA-2011:183
https://www.redhat.com/support/errata/RHSA-2011-1371.html
https://bugzilla.redhat.com/show_bug.cgi?id=743481
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18034

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.