|
 |
|
International Components for Unicode Regular Expressions Vulnerabilities
|
|
|
|
|
Secunia Advisory:
|
SA28575
|
|
|
Release Date:
|
2008-01-25
|
|
Last Update:
|
2008-07-03
|
|
|
Critical:
|
Moderately critical
|
|
Impact:
|
DoS
System access
|
|
Where:
|
From remote
|
|
Solution Status:
|
Vendor Workaround
|
|
| Software: | International Components for Unicode (ICU) 3.x
|
| | CVE reference: | CVE-2007-4770 (Secunia mirror)
CVE-2007-4771 (Secunia mirror)
|
|
|
|
|
|
Description:
Will Drewry has reported some vulnerabilities in International Components for Unicode, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise an application using the library.
1) A regular expression containing a back reference to capture group zero (\0) may reference random memory areas, which can be exploited to crash an application using the library.
2) The library does not limit the size of the backtracking stack. This can be exploited to cause a heap-based buffer overflow via certain specially crafted regular expressions.
The vulnerabilities are reported in version 3.8.1. Prior versions may also be affected.
Solution:
Apply vendor patch.
http://bugs.icu-project.org/trac/changeset/23292?format=3Ddiff
The vulnerabilities are also fixed in version 4.0.
Provided and/or discovered by:
Will Drewry
Changelog:
2008-07-03: Updated "Solution" section.
Original Advisory:
http://sourceforge.net/mailarchive/me...e42xb4a4aaf0fcccecbd%40mail.gmail.com
Other References:
https://bugzilla.redhat.com/show_bug.cgi?id=429023
https://bugzilla.redhat.com/show_bug.cgi?id=429025
|
|
|
|
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
|
|
|
Send Feedback to Secunia
|
|
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
|
|
|
|
|
|
Secunia PSI
Scan | Patch | Track
Free Download
|
|
|
Secunia Poll
|
|
|
|
|
 |
|
|
Most Popular Advisories
|
|
|
|
|
|
