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CVE-2011-1091

18
FAUCET Score

CVE-2011-1091 describes a denial-of-service vulnerability affecting Pidgin versions 2.6.0 through 2.7.10, specifically within the libpurple Yahoo! protocol plugin. This flaw allows remote authenticated users or Yahoo! servers to crash the application via malformed YMSG notification or SMS packets, respectively, due to a NULL pointer dereference. With a CVSS score of 4.0, this vulnerability has a low severity, requiring authentication and resulting only in a partial denial of service. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.6.0CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.6.0:*:*:*:*:*:*:*
2.6.1CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.6.1:*:*:*:*:*:*:*
2.6.2CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.6.2:*:*:*:*:*:*:*
2.6.4CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.6.4:*:*:*:*:*:*:*
2.6.5CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.6.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.01%
Probability of exploitation in next 30 days
EPSS Percentile
86.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0301 is in the 95th percentile among its peer group of 21,957 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: pidgin-0:2.6.6-7.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: pidgin-0:2.6.6-5.el5_7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: pidgin-0:2.7.9-3.el6
View patch

Vendor Advisories (1)

redhatCVE-2011-1091Low

Pidgin: Multiple NULL pointer dereference flaws in Yahoo protocol plug-in

Mar 10, 2011

References

developer.pidgin.im / viewmtn/revision/diff/5cbe18129b6e7c660bc093f7e5e1414ceca17d04/with/a7c415abba1f5f01f79295337518837f73d99bb7/libpurple/protocols/yahoo/libymsg.c
Patch
developer.pidgin.im / viewmtn/revision/info/a7c415abba1f5f01f79295337518837f73d99bb7
Patch
lists.fedoraproject.org / pipermail/package-announce/2011-March/055874.html
lists.fedoraproject.org / pipermail/package-announce/2011-March/056309.html
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/43695
Vendor Advisory
secunia.com / advisories/43721
secunia.com / advisories/46376
exchange.xforce.ibmcloud.com / vulnerabilities/66055
hermes.opensuse.org / messages/13195955
slackware.com / security/viewer.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18402
pidgin.im / news/security
PatchVendor Advisory
redhat.com / support/errata/RHSA-2011-0616.html
redhat.com / support/errata/RHSA-2011-1371.html
securityfocus.com / bid/46837
vupen.com / english/advisories/2011/0643
vupen.com / english/advisories/2011/0661
vupen.com / english/advisories/2011/0669
vupen.com / english/advisories/2011/0703