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CVE-2011-4603

18
FAUCET Score

CVE-2011-4603 describes a denial-of-service vulnerability in Pidgin versions prior to 2.10.1, specifically within the SILC protocol plugin's handling of message data. A remote attacker can exploit this by sending a specially crafted message that bypasses expected UTF-8 validation, leading to an application crash. This vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and no authentication required, resulting in a partial availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion 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
3.73%
Probability of exploitation in next 30 days
EPSS Percentile
88.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0373 is in the 85th percentile among its peer group of 23,701 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 (2)

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

Vendor Advisories (1)

redhatCVE-2011-4603Moderate

pidgin: SILC remote crash on channel messages

Dec 11, 2011

References

developer.pidgin.im / viewmtn/revision/diff/c7b95cc3be0590b52edc02d4750ae62844c1acb6/with/afb9ede3de989f217f03d5670cca00e628bd11f1/libpurple/protocols/silc/ops.c
Patch
developer.pidgin.im / viewmtn/revision/info/afb9ede3de989f217f03d5670cca00e628bd11f1
secunia.com / advisories/47234
hermes.opensuse.org / messages/13195955
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18303
pidgin.im / news/security
PatchVendor Advisory
redhat.com / support/errata/RHSA-2011-1820.html
securityfocus.com / bid/51074