Heap-Based Buffer Overflow in Perl 5 by The Perl Foundation

CVE-2017-12837

Summary

A heap-based buffer overflow vulnerability exists in the S_regatom function within regcomp.c of Perl 5, which can be exploited by remote attackers. By using a specially crafted regular expression containing a '\N{}' escape alongside the case-insensitive modifier, an attacker can trigger an out-of-bounds write. This results in a denial of service, potentially compromising the stability and availability of applications utilizing affected versions of Perl.

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