CVE-2011-4599

Stack-based buffer overflow in the _canonicalize function in common/uloc.c in International Components for Unicode (ICU) before 49.1 allows remote attackers to execute arbitrary code via a crafted locale ID that is not properly handled during variant canonicalization.

Published: 2012-06-21 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4599 is rated Moderate Risk (58.6/100): CVSS High severity, with high exploitation likelihood (EPSS 24.11%, 96th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2011-4599

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 2026-05-13 35.76% 24.11% -11.65%
2 2026-02-18 36.39% 35.76% -0.63%
3 2026-01-14 — 36.39% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4599

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2011-4599

OS Trackers for CVE-2011-4599

vendor priority summary link
debian not yet assigned CVE-2011-4599 not yet assigned priority: Debian including 1 source packages (icu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-4599
gentoo normal CVE-2011-4599: 1 GLSA(s) (201209-07), 1 atom(s) (dev-libs/icu); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4599
redhat medium — https://access.redhat.com/security/cve/CVE-2011-4599
ubuntu medium CVE-2011-4599 medium priority: Ubuntu including 1 source packages (icu), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 5, ignored 1. https://ubuntu.com/security/CVE-2011-4599

Affected software / configurations for CVE-2011-4599

Vendor Product Version Raw CPE
icu-project international_components_for_unicode < 49.1 cpe:2.3:a:icu-project:international_components_for_unicode:*:*:*:*:*:c\/c\+\+:*:*

References for CVE-2011-4599

URL Tags
http://bugs.icu-project.org/trac/ticket/8984 Issue Tracking Vendor Advisory
http://code.google.com/p/chromium/issues/detail?id=106441 Third Party Advisory
http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html Mailing List Third Party Advisory
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-01/msg00035.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2011-1815.html Third Party Advisory
http://secunia.com/advisories/47146 Permissions Required
http://secunia.com/advisories/47227 Permissions Required
http://secunia.com/advisories/47674 Permissions Required
http://secunia.com/advisories/47714 Permissions Required
http://secunia.com/advisories/47775 Permissions Required
http://support.apple.com/kb/HT5501 Third Party Advisory
http://support.apple.com/kb/HT5503 Third Party Advisory
http://ubuntu.com/usn/usn-1348-1 Third Party Advisory
http://www.debian.org/security/2012/dsa-2397 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2011:194 Third Party Advisory
http://www.openwall.com/lists/oss-security/2011/12/09/2 Mailing List
http://www.openwall.com/lists/oss-security/2011/12/09/5 Mailing List
http://www.osvdb.org/77698 Broken Link
http://www.securityfocus.com/bid/51006 Patch Third Party Advisory VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/71726 VDB Entry
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