[Bug 1187149] New: CVE-2013-7422 perl: segmentation fault in S_regmatch on negative backreference

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https://bugzilla.redhat.com/show_bug.cgi?id=1187149

            Bug ID: 1187149
           Summary: CVE-2013-7422 perl: segmentation fault in S_regmatch
                    on negative backreference
           Product: Security Response
         Component: vulnerability
          Keywords: Security
          Severity: medium
          Priority: medium
          Assignee: security-response-team@xxxxxxxxxx
          Reporter: mprpic@xxxxxxxxxx
                CC: cweyl@xxxxxxxxxxxxxxx, iarnell@xxxxxxxxx,
                    jplesnik@xxxxxxxxxx, kasal@xxxxxx,
                    perl-devel@xxxxxxxxxxxxxxxxxxxxxxx,
                    perl-maint-list@xxxxxxxxxx, ppisar@xxxxxxxxxx,
                    psabata@xxxxxxxxxx, rc040203@xxxxxxxxxx,
                    rmeggins@xxxxxxxxxx, tcallawa@xxxxxxxxxx



An integer underflow flaw was discovered in the way Perl parsed regular
expression backreferences. An attacker able to supply a crafted regular
expression to a Perl application could possibly use this flaw to crash that
application.

Reproducer:

$ perl -e '/\7777777777/'
Segmentation fault

Upstream issue:

https://rt.perl.org/Public/Bug/Display.html?id=119505

Upstream patch:

http://perl5.git.perl.org/perl.git/commitdiff/0c2990d652e985784f095bba4bc356481a66aa06

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