Pidgin: Multiple NULL pointer dereference flaws in Yahoo protocol plug-in
Published Mar 14, 2011
4.0
MEDIUMCVSS 2.0
EPSS 2.64%
Description
libymsg.c in the Yahoo! protocol plugin in libpurple in Pidgin 2.6.0 through 2.7.10 allows (1) remote authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG notification packet, and allows (2) remote Yahoo! servers to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG SMS message.
Affected products
No data.
- 2.6.0
- 2.6.1
- 2.6.2
- 2.6.4
- 2.6.5
- 2.6.6
- 2.7.0
- 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
No data.
Red Hat Enterprise Linux 4
pidgin-0:2.6.6-7.el4
Fixed · RHSA-2011:1371
Red Hat Enterprise Linux 5
pidgin-0:2.6.6-5.el5_7.1
Fixed · RHSA-2011:1371
Red Hat Enterprise Linux 6
pidgin-0:2.7.9-3.el6
Fixed · RHSA-2011:0616
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | pidgin-0:2.6.6-7.el4 | Fixed | RHSA-2011:1371 |
| Red Hat Enterprise Linux 5 | pidgin-0:2.6.6-5.el5_7.1 | Fixed | RHSA-2011:1371 |
| Red Hat Enterprise Linux 6 | pidgin-0:2.7.9-3.el6 | Fixed | RHSA-2011:0616 |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of pidgin package as shipped with Red Hat Enterprise Linux 4, 5 and 6. The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw.
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:S/C:N/I:N/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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.64% (0.02639) | 85.03th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.01% (0.03011) | 85.63th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.41% (0.01406) | 79.15th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.64% (0.01644) | 88.07th | v3 (v2023.03.01) |
| May 22, 2024 | 1.64% (0.01644) | 87.58th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.64% (0.01644) | 85.57th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.53% (0.02528) | 81.92th | v2 (v2022.01.01) |
| Feb 13, 2023 | 2.53% (0.02528) | 81.42th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.55% (0.01547) | 74.40th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.53% (0.02528) | 80.15th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.53% (0.02528) | 58.66th | v2 (v2022.01.01) |
References (23)
- http://developer.pidgin.im/viewmtn/revision/diff/5cbe18129b6e7c660bc093f7e5e1414ceca17d04/with/a7c415abba1f5f01f79295337518837f73d99bb7/libpurple/protocols/yahoo/libymsg.c x_refsource_CONFIRMPatch
- http://developer.pidgin.im/viewmtn/revision/info/a7c415abba1f5f01f79295337518837f73d99bb7 x_refsource_CONFIRMPatch
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055874.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056309.html vendor-advisoryx_refsource_FEDORA
- http://secunia.com/advisories/43695 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/43721 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/46376 third-party-advisoryx_refsource_SECUNIA
- http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.466884 vendor-advisoryx_refsource_SLACKWARE
- http://www.pidgin.im/news/security/?id=51 x_refsource_CONFIRMPatchVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2011-0616.html vendor-advisoryx_refsource_REDHAT
- http://www.redhat.com/support/errata/RHSA-2011-1371.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/bid/46837 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2011/0643 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2011/0661 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2011/0669 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2011/0703 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2011-1091 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=683031 x_refsource_CONFIRMIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66055 vdb-entryx_refsource_XF
- https://hermes.opensuse.org/messages/13195955 vendor-advisoryx_refsource_SUSE
- https://nvd.nist.gov/vuln/detail/CVE-2011-1091
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18402 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2011-1091
Change history (0)
No recorded changes yet.