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CVE-2011-4601

18
FAUCET Score

CVE-2011-4601 describes a denial-of-service vulnerability in Pidgin versions prior to 2.10.1, specifically within the oscar protocol plugin's family_feedbag.c. This flaw allows remote attackers to crash the application by sending a specially crafted AIM or ICQ message during a buddy-list addition, due to improper UTF-8 validation. Rated with a CVSS score of 5.0, it is a low-severity vulnerability requiring no authentication and having a low attack complexity, but only impacting availability. 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
<= 2.10.0CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.0.0:*:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.0.2:*:*:*:*:*:*:*
2.1.0CPE matchmatch criteria
cpe:2.3:a:pidgin:pidgin:2.1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.70%
Probability of exploitation in next 30 days
EPSS Percentile
90.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0470 is in the 87th percentile among its peer group of 23,703 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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-0:2.6.6-10.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: pidgin-0:2.6.6-5.el5_7.4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: pidgin-0:2.7.9-3.el6.2
View patch

Vendor Advisories (1)

redhatCVE-2011-4601Moderate

(libpurple): Invalid UTF-8 string handling in OSCAR messages

Dec 10, 2011

References

developer.pidgin.im / viewmtn/revision/diff/bc79b1bf09dcfa1d8edac86a06761fce7416e69c/with/757272a78a8ca6027d518e614712c3399e34dda3/libpurple/protocols/oscar/family_feedbag.c
developer.pidgin.im / viewmtn/revision/info/757272a78a8ca6027d518e614712c3399e34dda3
pidgin.im / news/security
Vendor Advisory
secunia.com / advisories/47219
secunia.com / advisories/47234
hermes.opensuse.org / messages/13195955
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18408
mandriva.com / security/advisories
openwall.com / lists/oss-security/2011/12/10/1
openwall.com / lists/oss-security/2011/12/10/2
redhat.com / support/errata/RHSA-2011-1820.html
redhat.com / support/errata/RHSA-2011-1821.html
securityfocus.com / bid/51010