CVE-2011-4939: Null Pointer Dereference

Published Mar 15, 2012
·
Updated

The pidginconvchatrenameuser 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.

Affected Software

46 affected components
Pidgin Pidgin=2.5.9
Pidgin Pidgin=2.5.8
Pidgin Pidgin=2.7.9
Pidgin Pidgin=2.7.5
Pidgin Pidgin=2.1.0
Pidgin Pidgin=2.7.4
Pidgin Pidgin=2.6.0
Pidgin Pidgin=2.5.2
Pidgin Pidgin=2.5.1
Pidgin Pidgin=2.6.3
Pidgin Pidgin=2.7.6
Pidgin Pidgin=2.7.11
Pidgin Pidgin=2.5.6
Pidgin Pidgin=2.7.10
Pidgin Pidgin=2.5.7
Pidgin Pidgin=2.0.1
Pidgin Pidgin=2.4.2
Pidgin Pidgin=2.7.3
Pidgin Pidgin=2.5.4
Pidgin Pidgin=2.5.5
Pidgin Pidgin=2.6.5
Pidgin Pidgin=2.2.2
Pidgin Pidgin=2.1.1
Pidgin Pidgin=2.3.1
Pidgin Pidgin=2.4.3
Pidgin Pidgin=2.6.6
Pidgin Pidgin=2.8.0
Pidgin Pidgin=2.0.0
Pidgin Pidgin=2.0.2
Pidgin Pidgin=2.3.0
Pidgin Pidgin=2.4.1
Pidgin Pidgin=2.4.0
Pidgin Pidgin=2.6.2
Pidgin Pidgin=2.5.0
Pidgin Pidgin=2.9.0
Pidgin Pidgin=2.2.0
Pidgin Pidgin=2.2.1
Pidgin Pidgin=2.7.8
Pidgin Pidgin=2.10.0
Pidgin Pidgin=2.7.7
Pidgin Pidgin=2.5.3
Pidgin Pidgin=2.6.1
Pidgin Pidgin=2.6.4
Pidgin Pidgin=2.7.2
Pidgin Pidgin=2.7.1
Pidgin Pidgin<=2.10.1

Event History

Mar 15, 2012
CVE Published
via MITRE·10:00 AM
Data Sourced
via MITRE·10:00 AM
Description
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Frequently Asked Questions

1

What is the severity of CVE-2011-4939?

CVE-2011-4939 has been classified as a denial of service vulnerability due to NULL pointer dereference, which can lead to application crashes.

2

How do I fix CVE-2011-4939?

To fix CVE-2011-4939, upgrade Pidgin to version 2.10.2 or later.

3

Which versions of Pidgin are affected by CVE-2011-4939?

CVE-2011-4939 affects Pidgin versions prior to 2.10.2.

4

What kind of attacks can exploit CVE-2011-4939?

CVE-2011-4939 can be exploited by remote attackers changing a nickname in an XMPP chat room, causing a denial of service.

5

Is there any official reference for CVE-2011-4939?

Yes, the official reference for CVE-2011-4939 can be found on the Pidgin developer's ticket page.

Contact

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