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This vulnerability exists when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string that includes a question mark (?). An unauthenticated attacker along with conditions beyond its control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","supportingMedia":[{"type":"text/html","base64":false,"value":"<span style=\"background-color: rgb(255, 255, 255);\">NGINX Plus and NGINX Open Source have a vulnerability in the </span><strong>ngx_http_rewrite_module</strong><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;module. This vulnerability exists when the </span><strong>rewrite</strong><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;directive is followed by a </span><strong>rewrite</strong><span style=\"background-color: rgb(255, 255, 255);\">, </span><strong>if</strong><span style=\"background-color: rgb(255, 255, 255);\">, or </span><strong>set</strong><span style=\"background-color: rgb(255, 255, 255);\">&nbsp;directive and an unnamed Perl-Compatible Regular Expression (PCRE) capture (for example, $1, $2) with a replacement string that includes a question mark (?). An unauthenticated attacker along with conditions beyond its control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.</span>&nbsp; Note: Software versions which have reached End of Technical Support (EoTS) are not 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