Comment 14 for bug 186578

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