CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 3CVE-2019-19522
https://notcve.org/view.php?id=CVE-2019-19522
OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to become root by leveraging membership in the auth group. This occurs because root's file can be written to /etc/skey or /var/db/yubikey, and need not be owned by root. OpenBSD versión 6.6, en una configuración no predeterminada donde la autenticación S/Key o YubiKey está habilitada, permite a usuarios locales convertirse a root mediante el aprovechamiento de la membresía en el grupo de autenticación. Esto ocurre porque el archivo root puede ser escrito en /etc/skey o /var/db/yubikey, y no es necesario que sea propiedad de root. • http://packetstormsecurity.com/files/155572/Qualys-Security-Advisory-OpenBSD-Authentication-Bypass-Privilege-Escalation.html http://seclists.org/fulldisclosure/2019/Dec/14 http://www.openwall.com/lists/oss-security/2019/12/04/5 https://seclists.org/bugtraq/2019/Dec/8 https://www.openbsd.org/errata66.html https://www.openwall.com/lists/oss-security/2019/12/04/5 • CWE-732: Incorrect Permission Assignment for Critical Resource •
CVSS: 7.5EPSS: 0%CPEs: 1EXPL: 2CVE-2019-8460
https://notcve.org/view.php?id=CVE-2019-8460
OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service. La versión del núcleo de OpenBSD anterior o igual a la versión 6.5 se puede forzar a crear largas cadenas de agujeros TCP SACK que provocan llamadas muy costosas a tcp_sack_option () para cada paquete SACK entrante que puede conducir a una denegación de servicio. • https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460 https://security.netapp.com/advisory/ntap-20190905-0001 https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03 • CWE-1049: Excessive Data Query Operations in a Large Data Table •
CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2018-14775
https://notcve.org/view.php?id=CVE-2018-14775
tss_alloc in sys/arch/i386/i386/gdt.c in OpenBSD 6.2 and 6.3 has a Local Denial of Service (system crash) due to incorrect I/O port access control on the i386 architecture. tss_alloc en sys/arch/i386/i386/gdt.c en OpenBSD 6.2 y 6.3 tiene una denegación de servicio (DoS) local (cierre inesperado del sistema) debido a un acceso incorrecto al puerto I/O en la arquitectura i386. • http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/arch/i386/i386/gdt.c http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sys/arch/i386/i386/gdt.c.diff?r1=1.37&r2=1.37.8.1&f=h http://www.securitytracker.com/id/1041550 https://ftp.openbsd.org/pub/OpenBSD/patches/6.2/common/020_ioport.patch.sig https://ftp.openbsd.org/pub/OpenBSD/patches/6.3/common/015_ioport.patch.sig • CWE-20: Improper Input Validation •
CVSS: 9.8EPSS: 0%CPEs: 1EXPL: 0CVE-2017-1000372
https://notcve.org/view.php?id=CVE-2017-1000372
A flaw exists in OpenBSD's implementation of the stack guard page that allows attackers to bypass it resulting in arbitrary code execution using setuid binaries such as /usr/bin/at. This affects OpenBSD 6.1 and possibly earlier versions. Existe un error en la implementación de OpenBSD de la página stack guard que permite que los atacantes la omitan, lo que resulta en la ejecución de código arbitrario mediante el uso de binarios setuid como /usr/bin/at. Esto afecta a OpenBSD 6.1 y posiblemente a versiones anteriores. • http://www.securityfocus.com/bid/99172 https://ftp.openbsd.org/pub/OpenBSD/patches/6.1/common/008_exec_subr.patch.sig https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt •
CVSS: 6.5EPSS: 1%CPEs: 1EXPL: 1CVE-2017-1000373 – OpenBSD - 'at Stack Clash' Local Privilege Escalation
https://notcve.org/view.php?id=CVE-2017-1000373
The OpenBSD qsort() function is recursive, and not randomized, an attacker can construct a pathological input array of N elements that causes qsort() to deterministically recurse N/4 times. This allows attackers to consume arbitrary amounts of stack memory and manipulate stack memory to assist in arbitrary code execution attacks. This affects OpenBSD 6.1 and possibly earlier versions. La función qsort() de OpenBSD es recursiva y no aleatorizada, por lo que un atacante puede construir un array de entrada patológica de elementos N que provoca que qsort() se repita inevitablemente N/4 veces. Esto permite que los atacantes consuman cantidades de memoria de pila arbitrarias y manipulen la memoria de pila para ayudar en los ataques de ejecución de código arbitrario. • https://www.exploit-db.com/exploits/42271 http://www.securityfocus.com/bid/99177 http://www.securitytracker.com/id/1039427 https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/qsort.c?rev=1.15&content-type=text/x-cvsweb-markup https://support.apple.com/HT208112 https://support.apple.com/HT208113 https://support.apple.com/HT208115 https://support.apple.com/HT208144 https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt • CWE-400: Uncontrolled Resource Consumption •