Description
Phalcon is a high-performance, full-stack PHP framework. Prior to 5.14.1, Phalcon\Encryption\Crypt::decrypt compares the attacker-supplied HMAC tag against the freshly computed HMAC using PHP/Zephir identity comparison, which lowers to a byte-wise comparison that returns early on the first differing byte. This observable timing discrepancy can allow an attacker to recover a valid tag byte-by-byte and attach it to a chosen IV and ciphertext so that decrypt() accepts tampered encrypted content as authentic. This issue is fixed in version 5.14.1.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
phalcon cphalcon
< 5.14.1affected
References
- https://github.com/phalcon/cphalcon/security/advisories/GHSA-8jqh-95g6-7jpj ↗
- https://github.com/phalcon/cphalcon/issues/17090 ↗
- https://github.com/phalcon/cphalcon/pull/17091 ↗
- https://github.com/phalcon/cphalcon/commit/ad53ab1b2e7ec59b3af92b0b37b8aaa099011137 ↗
- https://github.com/phalcon/cphalcon/releases/tag/v5.14.1 ↗