NULL pointer dereference in Pidgin - CVE-2011-4939
Published: March 15, 2012 / Updated: July 28, 2020
Vulnerability identifier: #VU32805
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-4939
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in gtkconv.c in Pidgin before 2.10.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) by changing a nickname while in an XMPP chat room. A remote attacker can perform a denial of service (DoS) attack.
Affected software
Pidgin
pidgin (Alpine package)
pidgin (Alpine package)
How to mitigate CVE-2011-4939
Update to version 2.10.2.
Pidgin - update to 2.10.2
pidgin (Alpine package) - addressed in versions 2.10.2-r0, 2.10.4-r0
pidgin (Alpine package) - addressed in versions 2.10.2-r0, 2.10.4-r0
External References
- http://developer.pidgin.im/ticket/14392
- http://developer.pidgin.im/viewmtn/revision/diff/10ead4688e3af4132d454fa3bc241480500651c9/with/d1d77da56217f3a083e1d459bef054db9f1d5699/pidgin/gtkconv.c
- http://developer.pidgin.im/viewmtn/revision/info/d1d77da56217f3a083e1d459bef054db9f1d5699
- http://pidgin.im/news/security/?id=60
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:029
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18406