CVE-2011-3594

Exp

The g_markup_escape_text function in the SILC protocol plug-in in libpurple 2.10.0 and earlier, as used in Pidgin and possibly other products, allows remote attackers to cause a denial of service (crash) via invalid UTF-8 sequences that trigger use of invalid pointers and an out-of-bounds read, related to interactions with certain versions of glib2.

Published: 2011-11-04 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3594 is rated High Exploit Risk (62.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.19%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-3594

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-3594

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-19 3.31% 3.19% -0.12%
2 2026-06-15 0.96% 3.31% +2.35%
3 2025-03-30 — 0.96% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3594

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-3594

OS Trackers for CVE-2011-3594

vendor priority summary link
debian unimportant CVE-2011-3594 unimportant priority: Debian including 1 source packages (pidgin), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-3594
gentoo high CVE-2011-3594: 1 GLSA(s) (201206-11), 1 atom(s) (net-im/pidgin); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-3594
redhat medium — https://access.redhat.com/security/cve/CVE-2011-3594
ubuntu medium CVE-2011-3594 medium priority: Ubuntu including 1 source packages (pidgin), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 3, ignored 1, needs-triage 1, not-affected 1. https://ubuntu.com/security/CVE-2011-3594

Affected software / configurations for CVE-2011-3594

Vendor Product Version Raw CPE
pidgin libpurple <= 2.10.0 cpe:2.3:a:pidgin:libpurple:*:*:*:*:*:*:*:*
pidgin libpurple 1.0 cpe:2.3:a:pidgin:libpurple:1.0:*:*:*:*:*:*:*
pidgin libpurple 2.0.0 cpe:2.3:a:pidgin:libpurple:2.0.0:*:*:*:*:*:*:*
pidgin libpurple 2.0.1 cpe:2.3:a:pidgin:libpurple:2.0.1:*:*:*:*:*:*:*
pidgin libpurple 2.0.2 cpe:2.3:a:pidgin:libpurple:2.0.2:*:*:*:*:*:*:*
pidgin libpurple 2.1.0 cpe:2.3:a:pidgin:libpurple:2.1.0:*:*:*:*:*:*:*
pidgin libpurple 2.1.1 cpe:2.3:a:pidgin:libpurple:2.1.1:*:*:*:*:*:*:*
pidgin libpurple 2.2.0 cpe:2.3:a:pidgin:libpurple:2.2.0:*:*:*:*:*:*:*
pidgin libpurple 2.2.1 cpe:2.3:a:pidgin:libpurple:2.2.1:*:*:*:*:*:*:*
pidgin libpurple 2.2.2 cpe:2.3:a:pidgin:libpurple:2.2.2:*:*:*:*:*:*:*
pidgin libpurple 2.3.0 cpe:2.3:a:pidgin:libpurple:2.3.0:*:*:*:*:*:*:*
pidgin libpurple 2.3.1 cpe:2.3:a:pidgin:libpurple:2.3.1:*:*:*:*:*:*:*
pidgin libpurple 2.4.0 cpe:2.3:a:pidgin:libpurple:2.4.0:*:*:*:*:*:*:*
pidgin libpurple 2.4.1 cpe:2.3:a:pidgin:libpurple:2.4.1:*:*:*:*:*:*:*
pidgin libpurple 2.4.2 cpe:2.3:a:pidgin:libpurple:2.4.2:*:*:*:*:*:*:*
pidgin libpurple 2.4.3 cpe:2.3:a:pidgin:libpurple:2.4.3:*:*:*:*:*:*:*
pidgin libpurple 2.5.0 cpe:2.3:a:pidgin:libpurple:2.5.0:*:*:*:*:*:*:*
pidgin libpurple 2.5.1 cpe:2.3:a:pidgin:libpurple:2.5.1:*:*:*:*:*:*:*
pidgin libpurple 2.5.2 cpe:2.3:a:pidgin:libpurple:2.5.2:*:*:*:*:*:*:*
pidgin libpurple 2.5.3 cpe:2.3:a:pidgin:libpurple:2.5.3:*:*:*:*:*:*:*
pidgin libpurple 2.5.4 cpe:2.3:a:pidgin:libpurple:2.5.4:*:*:*:*:*:*:*
pidgin libpurple 2.5.5 cpe:2.3:a:pidgin:libpurple:2.5.5:*:*:*:*:*:*:*
pidgin libpurple 2.5.6 cpe:2.3:a:pidgin:libpurple:2.5.6:*:*:*:*:*:*:*
pidgin libpurple 2.5.7 cpe:2.3:a:pidgin:libpurple:2.5.7:*:*:*:*:*:*:*
pidgin libpurple 2.5.8 cpe:2.3:a:pidgin:libpurple:2.5.8:*:*:*:*:*:*:*
pidgin libpurple 2.5.9 cpe:2.3:a:pidgin:libpurple:2.5.9:*:*:*:*:*:*:*
pidgin libpurple 2.6.0 cpe:2.3:a:pidgin:libpurple:2.6.0:*:*:*:*:*:*:*
pidgin libpurple 2.6.1 cpe:2.3:a:pidgin:libpurple:2.6.1:*:*:*:*:*:*:*
pidgin libpurple 2.6.2 cpe:2.3:a:pidgin:libpurple:2.6.2:*:*:*:*:*:*:*
pidgin libpurple 2.6.3 cpe:2.3:a:pidgin:libpurple:2.6.3:*:*:*:*:*:*:*
pidgin libpurple 2.6.4 cpe:2.3:a:pidgin:libpurple:2.6.4:*:*:*:*:*:*:*
pidgin libpurple 2.6.5 cpe:2.3:a:pidgin:libpurple:2.6.5:*:*:*:*:*:*:*
pidgin libpurple 2.6.6 cpe:2.3:a:pidgin:libpurple:2.6.6:*:*:*:*:*:*:*
pidgin libpurple 2.7.0 cpe:2.3:a:pidgin:libpurple:2.7.0:*:*:*:*:*:*:*
pidgin libpurple 2.7.1 cpe:2.3:a:pidgin:libpurple:2.7.1:*:*:*:*:*:*:*
pidgin libpurple 2.7.2 cpe:2.3:a:pidgin:libpurple:2.7.2:*:*:*:*:*:*:*
pidgin libpurple 2.7.3 cpe:2.3:a:pidgin:libpurple:2.7.3:*:*:*:*:*:*:*
pidgin libpurple 2.7.4 cpe:2.3:a:pidgin:libpurple:2.7.4:*:*:*:*:*:*:*
pidgin libpurple 2.7.5 cpe:2.3:a:pidgin:libpurple:2.7.5:*:*:*:*:*:*:*
pidgin libpurple 2.7.6 cpe:2.3:a:pidgin:libpurple:2.7.6:*:*:*:*:*:*:*
pidgin libpurple 2.7.7 cpe:2.3:a:pidgin:libpurple:2.7.7:*:*:*:*:*:*:*
pidgin libpurple 2.7.8 cpe:2.3:a:pidgin:libpurple:2.7.8:*:*:*:*:*:*:*
pidgin libpurple 2.7.9 cpe:2.3:a:pidgin:libpurple:2.7.9:*:*:*:*:*:*:*
pidgin libpurple 2.7.10 cpe:2.3:a:pidgin:libpurple:2.7.10:*:*:*:*:*:*:*
pidgin libpurple 2.7.11 cpe:2.3:a:pidgin:libpurple:2.7.11:*:*:*:*:*:*:*
pidgin libpurple 2.8.0 cpe:2.3:a:pidgin:libpurple:2.8.0:*:*:*:*:*:*:*
pidgin libpurple 2.9.0 cpe:2.3:a:pidgin:libpurple:2.9.0:*:*:*:*:*:*:*
pidgin pidgin — cpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:*

References for CVE-2011-3594

cvelogic Threat Intelligence