PCRE and PCRE2 'compile_branch' function denial of service vulnerability

PCRE is an open source regular expression library written in C. PCRE2 is an API for modifying PCRE. The 'compilebranch' function of PCRE and PCRE2 failed to properly handle regular expressions containing 'ACCEPT' substrings and nested parentheses. A remote attacker submitting a specially crafted...