CVE-2011-2943

Description

The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response.

4.3

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 3.96% Top 15%

Vendor Advisory pidgin.im Vendor Advisory secunia.com

Affected: n/a n/a

References

Link	Tags
http://pidgin.im/news/security/?id=53	patch vendor advisory
http://developer.pidgin.im/viewmtn/revision/info/5c2dba4a7e2e76b76e7f472b88953a4316706d43	patch
http://www.openwall.com/lists/oss-security/2011/08/22/2	mailing list
http://secunia.com/advisories/45663	third party advisory vendor advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18005	vdb entry signature
https://exchange.xforce.ibmcloud.com/vulnerabilities/69340	vdb entry
http://secunia.com/advisories/45916	third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=722939
http://www.securityfocus.com/bid/49268	vdb entry
http://developer.pidgin.im/viewmtn/revision/diff/5749f9193063800d27bef75c2388f6f9cc2f7f37/with/5c2dba4a7e2e76b76e7f472b88953a4316706d43/libpurple/protocols/irc/msgs.c	patch
http://securitytracker.com/id?1025961	vdb entry
http://www.openwall.com/lists/oss-security/2011/08/20/2	mailing list

Frequently Asked Questions

What is the severity of CVE-2011-2943?: CVE-2011-2943 has been scored as a medium severity vulnerability.
How to fix CVE-2011-2943?: To fix CVE-2011-2943, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-2943 being actively exploited in the wild?: It is possible that CVE-2011-2943 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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