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Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.
Impact
Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.
Patches
Fixed upstream in Perl 5.30.3
References
https://metacpan.org/pod/perldelta
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10878