CVE-2011-4939 json
The pidgin_conv_chat_rename_user function in gtkconv.c in Pidgin before 2.10.2 allows remote attackers to cause a denial of service (NULL p…
published 2012-03-15 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4849
- cvss
- 6.4
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.4%
- EPSS 3.4% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
The pidgin_conv_chat_rename_user function 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.
Patch / fix
- pidgin Debian 14, Debian 13, Debian 12 2.10.2-1
debian advisories DEBIAN-CVE-2011-4939
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2011-4939 updated cvss 3.5
pidgin: NULL pointer dereference in the XMPP protocol plug-in by renaming user name
-
Red Hat Enterprise Linux 5 pidgin Red Hat Enterprise Linux 6 finch, pidgin, libpurple, pidgin-perl, libpurple-tcl, libpurple-perlnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
3.38% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:N/I:P/A:P |
Classification
- Weakness
-
- CWE-264 Permissions, Privileges, and Access Controls
References
-
mandriva.com
/security/advisories?name=MDVSA-2012:029
vendor-advisory
-
pidgin.im
/news/security/?id=60
vendor-advisory
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18406
vdb-entry, signature
- developer.pidgin.im /ticket/14392
- developer.pidgin.im /viewmtn/revision/diff/10ead4688e3af4132d454fa3bc241480500651c9/with/d1d77da56217f3a083e1d459bef054db9f1d5699/
- developer.pidgin.im /viewmtn/revision/info/d1d77da56217f3a083e1d459bef054db9f1d5699
Sources
- CVE List CVE-2011-4939
- NVD CVE-2011-4939
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.