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CVSS: 7.8EPSS: 81%CPEs: 41EXPL: 32

Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect handling of a copy-on-write (COW) feature to write to a read-only memory mapping, as exploited in the wild in October 2016, aka "Dirty COW." La condición de carrera en mm / gup.c en el kernel de Linux 2.x a 4.x antes de 4.8.3 permite a los usuarios locales obtener privilegios aprovechando el manejo incorrecto de una función copy-on-write (COW) para escribir en un read- only la cartografía de la memoria, como explotados en la naturaleza en octubre de 2016, vulnerabilidad también conocida como "Dirty COW". A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system. Race condition in mm/gup.c in the Linux kernel allows local users to escalate privileges. • https://github.com/dirtycow/dirtycow.github.io https://www.exploit-db.com/exploits/40611 https://www.exploit-db.com/exploits/40838 https://www.exploit-db.com/exploits/40616 https://www.exploit-db.com/exploits/40839 https://www.exploit-db.com/exploits/40847 https://github.com/timwr/CVE-2016-5195 https://github.com/gbonacini/CVE-2016-5195 https://github.com/whu-enjoy/CVE-2016-5195 https://github.com/jas502n/CVE-2016-5195 https://github.com/arttnba3/CVE-2016- • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •

CVSS: 8.1EPSS: 0%CPEs: 20EXPL: 2

The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the "Key Compromise Impersonation (KCI)" issue. El protocolo TLS 1.2 y versiones anteriores soporta los valores rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh y ecdsa_fixed_ecdh para ClientCertificateType pero no documenta directamente la habilidad para computar el secreto maestro en determinadas situaciones con una clave de cliente secreta y una clave pública de servidor pero no una clave secreta de servidor, lo que facilita a atacantes man-in-the-middle suplantar servidores TLS aprovechando el conocimiento de la clave secreta para un certificado cliente X.509 arbitrariamente instalado, también conocido como problema "Key Compromise Impersonation (KCI)". • http://twitter.com/matthew_d_green/statuses/630908726950674433 http://www.openwall.com/lists/oss-security/2016/09/20/4 http://www.securityfocus.com/bid/93071 https://kcitls.org https://security.netapp.com/advisory/ntap-20180626-0002 https://www.usenix.org/system/files/conference/woot15/woot15-paper-hlauschek.pdf • CWE-295: Improper Certificate Validation •

CVSS: 4.3EPSS: 0%CPEs: 5EXPL: 0

OpenSSH, when using OPIE (One-Time Passwords in Everything) for PAM, allows remote attackers to determine the existence of certain user accounts, which displays a different response if the user account exists and is configured to use one-time passwords (OTP), a similar issue to CVE-2007-2243. OpenSSH, cuando utiliza OPIE(One-Time Passwords in Everything) para PAM, permiet a atacantes remotos determinar la existencia de ciertas cuentas de usuarios, lo cual muestra una respuesta diferente si la cuenta de usuario existe y si está configurada para utilizar one-time passwords (OTP), un asunto similar es el CVE-2007-2243. • http://archives.neohapsis.com/archives/fulldisclosure/2007-04/0635.html http://www.osvdb.org/34601 https://security.netapp.com/advisory/ntap-20191107-0002 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •