// For flags

CVE-2007-4770

libicu poor back reference validation

Severity Score

9.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

libicu in International Components for Unicode (ICU) 3.8.1 and earlier attempts to process backreferences to the nonexistent capture group zero (aka \0), which might allow context-dependent attackers to read from, or write to, out-of-bounds memory locations, related to corruption of REStackFrames.

libicu de International Components for Unicode (ICU) 3.8.1 y versiones anteriores intenta procesar referencias a un grupo de captura no existente cero (también conocido como \0), lo cual podría permitir a atacantes locales o remotos dependientes del contexto leer desde, ó escribir en, direcciones de memoria fuera de los límites, relativo a corrupción de REStackFrames.

libicu in International Components for Unicode (ICU) 3.8.1 and earlier attempts to process backreferences to the nonexistent capture group zero (aka \0), which might allow context-dependent attackers to read from, or write to, out-of-bounds memory locations, related to corruption of REStackFrames. A 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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2007-09-10 CVE Reserved
  • 2008-01-26 CVE Published
  • 2024-08-07 CVE Updated
  • 2025-04-26 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-399: Resource Management Errors
CAPEC
References (28)
URL Tag Source
http://securitytracker.com/id?1019269 Third Party Advisory
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0043 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 Mailing List
http://www.securityfocus.com/bid/27455 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://exchange.xforce.ibmcloud.com/vulnerabilities/39938 Third Party Advisory
https://issues.rpath.com/browse/RPL-2199 Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11172 Signature
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5507 Signature
URL Date SRC
URL Date SRC
http://sourceforge.net/mailarchive/message.php?msg_name=d03a2ffb0801221538x68825e42xb4a4aaf0fcccecbd%40mail.gmail.com 2018-10-15
URL Date SRC
http://lists.opensuse.org/opensuse-security-announce/2008-03/msg00001.html 2018-10-15
http://rhn.redhat.com/errata/RHSA-2008-0090.html 2018-10-15
http://security.gentoo.org/glsa/glsa-200803-20.xml 2018-10-15
http://security.gentoo.org/glsa/glsa-200805-16.xml 2018-10-15
http://sunsolve.sun.com/search/document.do?assetkey=1-26-231641-1 2018-10-15
http://sunsolve.sun.com/search/document.do?assetkey=1-26-233922-1 2018-10-15
http://www.debian.org/security/2008/dsa-1511 2018-10-15
http://www.mandriva.com/security/advisories?name=MDVSA-2008:026 2018-10-15
http://www.novell.com/linux/security/advisories/2008_23_openoffice.html 2018-10-15
http://www.ubuntu.com/usn/usn-591-1 2018-10-15
https://bugzilla.redhat.com/show_bug.cgi?id=429023 2008-01-25
https://www.redhat.com/archives/fedora-package-announce/2008-January/msg00896.html 2018-10-15
https://www.redhat.com/archives/fedora-package-announce/2008-January/msg00921.html 2018-10-15
https://access.redhat.com/security/cve/CVE-2007-4770 2008-01-25
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Icu-project
Search vendor "Icu-project"
 International Components For Unicode
Search vendor "Icu-project" for product "International Components For Unicode"
 <= 3.8.1
Search vendor "Icu-project" for product "International Components For Unicode" and version " <= 3.8.1"
c\/c\+\+
Affected