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CVE-2011-3594

18
FAUCET Score

CVE-2011-3594 describes a denial-of-service vulnerability in the g_markup_escape_text function within the SILC protocol plug-in of libpurple 2.10.0 and earlier, affecting products like Pidgin. Remote attackers can trigger a crash by sending invalid UTF-8 sequences, leading to invalid pointer usage and an out-of-bounds read, particularly when interacting with certain glib2 versions. This vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial availability impact, with no confidentiality or integrity impact. There is no evidence of active exploitation, publicly available 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:libpurple:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:pidgin:libpurple:1.0:*:*:*:*:*:*:*
2.0.0CPE matchmatch criteria
cpe:2.3:a:pidgin:libpurple:2.0.0:*:*:*:*:*:*:*
2.0.1CPE matchmatch criteria
cpe:2.3:a:pidgin:libpurple:2.0.1:*:*:*:*:*:*:*
2.0.2CPE matchmatch criteria
cpe:2.3:a:pidgin:libpurple:2.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.19%
Probability of exploitation in next 30 days
EPSS Percentile
86.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0319 is in the 81st percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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-0:2.6.6-7.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

Vendor Advisories (1)

redhatCVE-2011-3594Moderate

libpurple: invalid UTF-8 string handling in SILC messages

Sep 29, 2011

References

developer.pidgin.im / ticket/14636
Exploit
developer.pidgin.im / viewmtn/revision/diff/be5e66abad2af29604bc794cc4c6600ab12751f3/with/7eb1f6d56cc58bbb5b56b7df53955d36b9b419b8
pidgin.im / news/security
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/46376
Vendor Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18034
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2011-1371.html