pidgin: NULL pointer dereference in the XMPP protocol plug-in by renaming user name
Published Mar 15, 2012
6.4
MEDIUMCVSS 2.0
EPSS 3.51%
Description
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.
Affected products
No data.
- ≤ 2.10.1
- 2.0.0
- 2.0.1
- 2.0.2
- 2.1.0
- 2.1.1
- 2.2.0
- 2.2.1
- 2.2.2
- 2.3.0
- 2.3.1
- 2.4.0
- 2.4.1
- 2.4.2
- 2.4.3
- 2.5.0
- 2.5.1
- 2.5.2
- 2.5.3
- 2.5.4
- 2.5.5
- 2.5.6
- 2.5.7
- 2.5.8
- 2.5.9
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.3
- 2.6.4
- 2.6.5
- 2.6.6
- 2.7.1
- 2.7.2
- 2.7.3
- 2.7.4
- 2.7.5
- 2.7.6
- 2.7.7
- 2.7.8
- 2.7.9
- 2.7.10
- 2.7.11
- 2.8.0
- 2.9.0
- 2.10.0
No data.
Red Hat Enterprise Linux 5
pidgin
Not affected
Red Hat Enterprise Linux 6
pidgin
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | pidgin | Not affected | n/a |
| Red Hat Enterprise Linux 6 | pidgin | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not Vulnerable. This issue does not affect the version of pidgin as shipped with Red Hat Enterprise Linux 5 and 6.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.51% (0.03509) | 88.81th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.55% (0.03549) | 87.76th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.10% (0.01102) | 76.08th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.03% (0.03035) | 77.69th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.21% (0.01214) | 77.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.55% (0.01554) | 87.70th | v3 (v2023.03.01) |
| May 8, 2024 | 1.55% (0.01554) | 87.11th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.55% (0.01554) | 85.11th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (10)
- http://developer.pidgin.im/ticket/14392 x_refsource_CONFIRM
- http://developer.pidgin.im/viewmtn/revision/diff/10ead4688e3af4132d454fa3bc241480500651c9/with/d1d77da56217f3a083e1d459bef054db9f1d5699/pidgin/gtkconv.c x_refsource_CONFIRM
- http://developer.pidgin.im/viewmtn/revision/info/d1d77da56217f3a083e1d459bef054db9f1d5699 x_refsource_CONFIRM
- http://pidgin.im/news/security/?id=60 x_refsource_CONFIRMVendor Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:029 vendor-advisoryx_refsource_MANDRIVA
- https://access.redhat.com/security/cve/CVE-2011-4939 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=803296 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-4939
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18406 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-4939
| Link | Providers | Tags |
|---|---|---|
| http://developer.pidgin.im/ticket/14392 | x_refsource_CONFIRM | |
| http://developer.pidgin.im/viewmtn/revision/diff/10ead4688e3af4132d454fa3bc241480500651c9/with/d1d77da56217f3a083e1d459bef054db9f1d5699/pidgin/gtkconv.c | x_refsource_CONFIRM | |
| http://developer.pidgin.im/viewmtn/revision/info/d1d77da56217f3a083e1d459bef054db9f1d5699 | x_refsource_CONFIRM | |
| http://pidgin.im/news/security/?id=60 | x_refsource_CONFIRMVendor Advisory | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2012:029 | vendor-advisoryx_refsource_MANDRIVA | |
| https://access.redhat.com/security/cve/CVE-2011-4939 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=803296 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-4939 | ||
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18406 | vdb-entrysignaturex_refsource_OVAL | |
| https://www.cve.org/CVERecord?id=CVE-2011-4939 |
Change history (0)
No recorded changes yet.