Secunia Security Advisory - 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.
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TITLE:
International Components for Unicode Regular Expressions
Vulnerabilities
SECUNIA ADVISORY ID:
SA28575
VERIFY ADVISORY:
http://secunia.com/advisories/28575/
CRITICAL:
Moderately critical
IMPACT:
DoS, System access
WHERE:
>From remote
SOFTWARE:
International Components for Unicode (ICU) 3.x
http://secunia.com/product/17328/
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 vulnerability is reported in version 3.8.1. Other versions may
also be affected.
SOLUTION:
Apply patch.
http://source.icu-project.org/repos/icu/icu/branches/maint/maint-3-8
PROVIDED AND/OR DISCOVERED BY:
Will Drewry
ORIGINAL ADVISORY:
http://sourceforge.net/mailarchive/message.php?msg_name=d03a2ffb0801221538x68825e42xb4a4aaf0fcccecbd%40mail.gmail.com
OTHER REFERENCES:
https://bugzilla.redhat.com/show_bug.cgi?id=429023
https://bugzilla.redhat.com/show_bug.cgi?id=429025
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