#VU44442 Input validation error in Pidgin - CVE-2011-4602

Vulnerability identifier: #VU44442

Vulnerability 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-2011-4602

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Pidgin
Client/Desktop applications / Messaging software

Vendor: pidgin.im

Description

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

The XMPP protocol plugin in libpurple in Pidgin before 2.10.1 does not properly handle missing fields in (1) voice-chat and (2) video-chat stanzas, which allows remote attackers to cause a denial of service (application crash) via a crafted message.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Pidgin: 2.0.0 - 2.9.0

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External links
https://developer.pidgin.im/viewmtn/revision/info/fb216fc88b085afc06d9a15209519cde1f4df6c6
https://pidgin.im/news/security/?id=58
https://secunia.com/advisories/47219
https://secunia.com/advisories/47234
https://www.redhat.com/support/errata/RHSA-2011-1820.html
https://www.redhat.com/support/errata/RHSA-2011-1821.html
https://hermes.opensuse.org/messages/13195955
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18420

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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.