CVE-2007-4771

Heap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components for Unicode (ICU) 3.8.1 and earlier allows context-dependent attackers to cause a denial of service (memory consumption) and possibly have unspecified other impact via a regular expression that writes a large amount of data to the backtracking stack. NOTE: some of these details are obtained from third party information.

Published: 2008-01-29 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-4771 is rated High Risk (65.3/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 2.33%). 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-2007-4771

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 2025-03-30 3.42% 2.33% -1.08%
2 2025-03-29 2.33% 3.42% +1.08%
3 2025-03-19 — 2.33% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-4771

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C 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:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2007-4771

OS Trackers for CVE-2007-4771

vendor priority summary link
debian not yet assigned CVE-2007-4771 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-2007-4771
gentoo normal CVE-2007-4771: 2 GLSA(s) (200803-20, 200805-16), 3 atom(s) (app-office/openoffice, app-office/openoffice-bin, dev-libs/icu); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2007-4771
redhat high — https://access.redhat.com/security/cve/CVE-2007-4771
suse critical CVE-2007-4771 severity critical: SUSE including 20 source package names (icu-4.0-7.26.15, icu-77.1-160000.2.2, …), 26 product×package rows across 6 product lines (SUSE Linux Enterprise Server 11 SP1, SUSE Linux Enterprise Server 11 SP2, … (6 product lines)): Fixed 26. https://www.suse.com/security/cve/CVE-2007-4771/
ubuntu low CVE-2007-4771 low priority: Ubuntu including 1 source packages (icu), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): released 4, needed 1. https://ubuntu.com/security/CVE-2007-4771

Affected software / configurations for CVE-2007-4771

Vendor Product Version Raw CPE
icu-project international_components_for_unicode <= 3.8.1 cpe:2.3:a:icu-project:international_components_for_unicode:*:*:*:*:*:c\/c\+\+:*:*

References for CVE-2007-4771

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2008-03/msg00001.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2008-0090.html Third Party Advisory
http://secunia.com/advisories/28575 Permissions Required
http://secunia.com/advisories/28615 Permissions Required
http://secunia.com/advisories/28669 Permissions Required
http://secunia.com/advisories/28783 Permissions Required
http://secunia.com/advisories/29194 Permissions Required
http://secunia.com/advisories/29242 Permissions Required
http://secunia.com/advisories/29291 Permissions Required
http://secunia.com/advisories/29294 Permissions Required
http://secunia.com/advisories/29333 Permissions Required
http://secunia.com/advisories/29852 Permissions Required
http://secunia.com/advisories/29910 Permissions Required
http://secunia.com/advisories/29987 Permissions Required
http://secunia.com/advisories/30179 Permissions Required
http://security.gentoo.org/glsa/glsa-200803-20.xml Third Party Advisory
http://security.gentoo.org/glsa/glsa-200805-16.xml Third Party Advisory
http://securitytracker.com/id?1019269 Third Party Advisory VDB Entry
http://sourceforge.net/mailarchive/message.php?msg_name=d03a2ffb0801221538x68825e42xb4a4aaf0fcccecbd%40mail.gmail.com Third Party Advisory
http://sunsolve.sun.com/search/document.do?assetkey=1-26-231641-1 Broken Link
http://sunsolve.sun.com/search/document.do?assetkey=1-26-233922-1 Broken Link
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0043 Third Party Advisory
http://www.debian.org/security/2008/dsa-1511 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:026 Broken Link
http://www.novell.com/linux/security/advisories/2008_23_openoffice.html Third Party Advisory
http://www.openoffice.org/security/cves/CVE-2007-4770.html Third Party Advisory
http://www.openoffice.org/security/cves/CVE-2007-5745.html Third Party Advisory
http://www.securityfocus.com/archive/1/487677/100/0/threaded
http://www.securityfocus.com/bid/27455 Patch Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/usn-591-1 Third Party Advisory
http://www.vupen.com/english/advisories/2008/0282 Third Party Advisory
http://www.vupen.com/english/advisories/2008/0807/references Third Party Advisory
http://www.vupen.com/english/advisories/2008/1375/references Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=429025 Issue Tracking Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/39936 Third Party Advisory VDB Entry
https://issues.rpath.com/browse/RPL-2199 Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10507 Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5431 Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2008-January/msg00896.html Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2008-January/msg00921.html Third Party Advisory
cvelogic Threat Intelligence