INFORMATION BULLETIN

S-136: International Components for Unicode Library (libicu) Vulnerabilities

[Security Focus 27455]

January 29, 2008 21:00 GMT
[REVISED 4 Mar 2008]


PROBLEM:	The International Components for Unicode library (libicu) is prone to multiple memory-corruption vulnerabilities.
PLATFORM:	libicu 3.8.1 and prior versions Debian GNU/Linux 4.0 (etch)
DAMAGE:	Allows remote attackers to corrupt and overflow memory and possibly execute remote code.
SOLUTION:	Upgrade to the appropriate version.

VULNERABILITY ASSESSMENT:	The risk is MEDIUM. Successfully exploiting these issues allows remote attackers to corrupt and overflow memory and possibly execute remote code. Failed exploit attempts will likely crash applications.

LINKS:
CIAC BULLETIN:	http://www.ciac.org/ciac/bulletins/s-136.shtml
ORIGINAL BULLETIN:	http://www.securityfocus.com/bid/27455/discuss
ADDITIONAL LINK:	http://www.debian.org/security/2008/dsa-1511
CVE:	CVE-2007-4770 CVE-2007-4771

REVISION HISTORY:
03/04/2008 - revised S-136 to add a link to Debian Security Advisory DSA-1511-1 for 
             Debian GNU/Linux 4.0 (etch).



[***** Start Security Focus 27455 *****]

International Components for Unicode Library (libicu) Multiple Memory Corruption Vulnerabilities

The International Components for Unicode library (libicu) is prone to multiple memory-corruption vulnerabilities.

Successfully exploiting these issues allows remote attackers to corrupt and overflow memory and possibly execute remote code. Failed exploit attempts will likely crash applications.

These issues affect libicu 3.8.1 and prior versions.

Bugtraq ID: 27455
Class: Unknown
CVE: CVE-2007-4770
CVE-2007-4771

Remote: Yes
Local: No
Published: Jan 25 2008 12:00AM
Updated: Jan 28 2008 07:27PM
Credit: Will Drewry is credited with the discovery of these issues.
Vulnerable: RedHat Fedora 8 0
RedHat Fedora 7 0
RedHat Enterprise Linux Desktop Workstation 5 client
RedHat Enterprise Linux Desktop 5 client
RedHat Enterprise Linux 5 server
MandrakeSoft Linux Mandrake 2008.0 x86_64
MandrakeSoft Linux Mandrake 2008.0
ICU Project International Components for Unicode 3.8.1
ICU Project International Components for Unicode 3.8
ICU Project International Components for Unicode 3.6
ICU Project International Components for Unicode 0


[***** End Security Focus 27455 *****]

CIAC wishes to acknowledge the contributions of Security Focus for the information contained in this bulletin.

CIAC services are available to DOE, DOE Contractors, and the NIH. CIAC can be contacted at:

    Voice:          +1 925-422-8193 (7 x 24)
    FAX:            +1 925-423-8002
    STU-III:        +1 925-423-2604
    E-mail:          ciac@ciac.org
    World Wide Web:  http://www.ciac.org/
    Anonymous FTP:   ftp.ciac.org

This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.

UCRL-MI-119788
[Privacy and Legal Notice]