CVE-2009-0021 – ntp incorrectly checks for malformed signatures

https://notcve.org/view.php?id=CVE-2009-0021

NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077. NTP versiones 4.2.4 anteriores a 4.2.4p5 y versiones 4.2.5 anteriores a 4.2.5p150, no comprueba apropiadamente el valor devuelto de la función EVP_VerifyFinal de OpenSSL, que permite a los atacantes remotos omitir la comprobación de la cadena de certificados por medio de una firma de SSL/TLS malformada para las claves DSA y ECDSA, una vulnerabilidad similar a CVE-2008-5077. • http://lists.apple.com/archives/security-announce/2009/May/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00003.html http://secunia.com/advisories/33406 http://secunia.com/advisories/33558 http://secunia.com/advisories/33648 http://secunia.com/advisories/34642 http://secunia.com/advisories/35074 http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.531177 • CWE-287: Improper Authentication •