CVSS: 5.3EPSS: 1%CPEs: 6EXPL: 0CVE-2015-5146
https://notcve.org/view.php?id=CVE-2015-5146
ntpd in ntp before 4.2.8p3 with remote configuration enabled allows remote authenticated users with knowledge of the configuration password and access to a computer entrusted to perform remote configuration to cause a denial of service (service crash) via a NULL byte in a crafted configuration directive packet. ntpd en ntp en versiones anteriores a la 4.2.8p3 con la configuración remota habilitada permite que usuarios remotos autenticados que conozcan la contraseña de configuración y acceso a un ordenador asignado para realizar configuraciones remotas provoquen una denegación de servicio (bloque de servicio) mediante un byte NULL en una directiva de paquete de configuración manipulada. • http://bugs.ntp.org/show_bug.cgi?id=2853 http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170926.html http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169167.html http://lists.fedoraproject.org/pipermail/package-announce/2015-September/166992.html http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu http://www.debian.org/security/2015/dsa-3388 http://www.securityfocus.com/bid/75589 http://www.securitytracker.com/ • CWE-20: Improper Input Validation •
CVSS: 2.6EPSS: 0%CPEs: 1EXPL: 0CVE-2015-1798 – ntp: ntpd accepts unauthenticated packets with symmetric key crypto
https://notcve.org/view.php?id=CVE-2015-1798
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC. La característica symmetric-key en la función receive en ntp_proto.c en ntpd en NTP 4.x anterior a 4.2.8p2 requiere un MAC correcto únicamente si el campo MAC tiene una longitud que no sea cero, lo que facilita a atacantes man-in-the-middle falsificar paquetes mediante la omisión del MAC. It was found that ntpd did not check whether a Message Authentication Code (MAC) was present in a received packet when ntpd was configured to use symmetric cryptographic keys. A man-in-the-middle attacker could use this flaw to send crafted packets that would be accepted by a client or a peer without the attacker knowing the symmetric key. • http://bugs.ntp.org/show_bug.cgi?id=2779 http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html http://marc.info/?l=bugtraq&m=143213867103400&w=2 http://rhn.redhat.com/errata/RHSA-2015-1459.html http://support.apple.com/kb/HT204942 http: • CWE-17: DEPRECATED: Code CWE-347: Improper Verification of Cryptographic Signature •
CVSS: 4.3EPSS: 0%CPEs: 1EXPL: 0CVE-2015-1799 – ntp: authentication doesn't protect symmetric associations against DoS attacks
https://notcve.org/view.php?id=CVE-2015-1799
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer. La característica symmetric-key en la función receive en ntp_proto.c en ntpd en NTP 3.x y 4.x anterior a 4.2.8p2 realiza actualizaciones de las variables de estados al recibir ciertos paquetes inválidos, lo que facilita a atacantes man-in-the-middle causar una denegación de servicio (perdida de sincronización) mediante la falsificación de la dirección del IP de fuente de un par. A denial of service flaw was found in the way NTP hosts that were peering with each other authenticated themselves before updating their internal state variables. An attacker could send packets to one peer host, which could cascade to other peers, and stop the synchronization process among the reached peers. • http://bugs.ntp.org/show_bug.cgi?id=2781 http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155863.html http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155864.html http://lists.opensuse.org/opensuse-updates/2015-04/msg00052.html http://marc.info/?l=bugtraq&m=143213867103400&w=2 http://marc • CWE-17: DEPRECATED: Code •
CVSS: 7.5EPSS: 3%CPEs: 1EXPL: 1CVE-2014-9294 – ntp: ntp-keygen uses weak random number generator and seed when generating MD5 keys
https://notcve.org/view.php?id=CVE-2014-9294
util/ntp-keygen.c in ntp-keygen in NTP before 4.2.7p230 uses a weak RNG seed, which makes it easier for remote attackers to defeat cryptographic protection mechanisms via a brute-force attack. util/ntp-keygen.c en ntp-keygen en NTP anterior a 4.2.7p230 emplea una semilla RNG débil, esto hace que sea más fácil romper los mecanismos de cifrado atacantes remotos mediante un ataque de fuerza bruta. It was found that ntp-keygen used a weak method for generating MD5 keys. This could possibly allow an attacker to guess generated MD5 keys that could then be used to spoof an NTP client or server. Note: it is recommended to regenerate any MD5 keys that had explicitly been generated with ntp-keygen; the default installation does not contain such keys. • http://advisories.mageia.org/MGASA-2014-0541.html http://bk1.ntp.org/ntp-dev/util/ntp-keygen.c?PAGE=diffs&REV=4eae1b72298KRoBQmX-y8URCiRPH5g http://bugs.ntp.org/show_bug.cgi?id=2666 http://marc.info/?l=bugtraq&m=142469153211996&w=2 http://marc.info/?l=bugtraq&m=142590659431171&w=2 http://marc.info/? • CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) •
CVSS: 5.0EPSS: 2%CPEs: 1EXPL: 1CVE-2014-9296 – ntp: receive() missing return on error
https://notcve.org/view.php?id=CVE-2014-9296
The receive function in ntp_proto.c in ntpd in NTP before 4.2.8 continues to execute after detecting a certain authentication error, which might allow remote attackers to trigger an unintended association change via crafted packets. La función de recepción en ntp_proto.c en ntpd en NTP anterior a 4.2.8 continúa ejecutando después de detectar un cierto error de autenticación, lo que podría permitir a un atacante remoto a provocar una asociación involuntaria mediante paquetes modificados. A missing return statement in the receive() function could potentially allow a remote attacker to bypass NTP's authentication mechanism. • http://advisories.mageia.org/MGASA-2014-0541.html http://bk1.ntp.org/ntp-dev/?PAGE=patch&REV=548ad06feXHK1HlZoY-WZVyynwvwAg http://bugs.ntp.org/show_bug.cgi?id=2670 http://lists.opensuse.org/opensuse-security-announce/2014-12/msg00020.html http://marc.info/?l=bugtraq&m=142590659431171&w=2 http://marc.info/?l=bugtraq&m=142853370924302&w=2 http://marc.info/? • CWE-17: DEPRECATED: Code CWE-390: Detection of Error Condition Without Action •