Cphalcon
Monthly
Regular-expression denial of service (ReDoS) in the Phalcon PHP framework before 5.15.0 lets remote unauthenticated attackers exhaust server CPU by sending a crafted request URI. Every default MVC application registers a built-in route whose compiled PCRE pattern contains a nested quantifier that Router::handle() evaluates against the raw request path on every request, so a path with repeated slashes followed by decoded newlines triggers catastrophic backtracking. There is no public exploit identified at time of analysis, and the CVSS 4.0 score of 8.7 reflects a high availability impact with no confidentiality or integrity effect.
Authentication-bypass via timing side-channel in Phalcon's Crypt::decrypt (cphalcon PHP framework prior to 5.14.1) allows remote attackers to forge valid HMAC tags and have tampered ciphertext accepted as authentic. Because the HMAC verification uses PHP/Zephir identity comparison that short-circuits on the first mismatching byte, an attacker who can observe response timing can recover a valid tag byte-by-byte and break the encrypt-then-MAC integrity guarantee. There is no public exploit identified at time of analysis and it is not in CISA KEV, but the flaw is confirmed and patched by the vendor in 5.14.1.
Regular-expression denial of service (ReDoS) in the Phalcon PHP framework before 5.15.0 lets remote unauthenticated attackers exhaust server CPU by sending a crafted request URI. Every default MVC application registers a built-in route whose compiled PCRE pattern contains a nested quantifier that Router::handle() evaluates against the raw request path on every request, so a path with repeated slashes followed by decoded newlines triggers catastrophic backtracking. There is no public exploit identified at time of analysis, and the CVSS 4.0 score of 8.7 reflects a high availability impact with no confidentiality or integrity effect.
Authentication-bypass via timing side-channel in Phalcon's Crypt::decrypt (cphalcon PHP framework prior to 5.14.1) allows remote attackers to forge valid HMAC tags and have tampered ciphertext accepted as authentic. Because the HMAC verification uses PHP/Zephir identity comparison that short-circuits on the first mismatching byte, an attacker who can observe response timing can recover a valid tag byte-by-byte and break the encrypt-then-MAC integrity guarantee. There is no public exploit identified at time of analysis and it is not in CISA KEV, but the flaw is confirmed and patched by the vendor in 5.14.1.