CVE-2011-2943
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…
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Timeline
ID reserved
By redhat
- 33 days later
· 33 days later
Published
- 13 years later
· 13 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 3.6% · top 10% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (12)
- http://pidgin.im/news/security/?id=53 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://developer.pidgin.im/viewmtn/revision/info/5c2dba4a7e2e76b76e7f472b88953a4316706d43 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20110822 Re: CVE request: Pidgin crash (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 45663 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- oval:org.mitre.oval:def:18005 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- pidgin-irc-protocol-dos(69340) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 45916 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=722939 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 49268 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://developer.pidgin.im/viewmtn/revision/diff/5749f9193063800d27bef75c2388f6f9cc2f7f37/with/5c2dba4a7e2e76b76e7f472b88953a4316706d43/libpurple/protocols/irc/msgs.c (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1025961 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- [oss-security] 20110820 CVE request: Pidgin crash (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2011-2943)Record last updated .