CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 5CVE-2019-19726 – OpenBSD 6.x - Dynamic Loader Privilege Escalation
https://notcve.org/view.php?id=CVE-2019-19726
OpenBSD through 6.6 allows local users to escalate to root because a check for LD_LIBRARY_PATH in setuid programs can be defeated by setting a very small RLIMIT_DATA resource limit. When executing chpass or passwd (which are setuid root), _dl_setup_env in ld.so tries to strip LD_LIBRARY_PATH from the environment, but fails when it cannot allocate memory. Thus, the attacker is able to execute their own library code as root. OpenBSD versiones hasta 6.6, permite a usuarios locales escalar a root porque una comprobación de LD_LIBRARY_PATH en los programas setuid puede ser vencida estableciendo un límite de recursos de RLIMIT_DATA muy pequeño. Al ejecutar chpass o passwd (que son root de setuid), en la función _dl_setup_env en el archivo ld.so intenta eliminar LD_LIBRARY_PATH del entorno, pero presenta un fallo cuando no puede asignar memoria. • https://www.exploit-db.com/exploits/47780 https://www.exploit-db.com/exploits/47803 http://packetstormsecurity.com/files/155658/Qualys-Security-Advisory-OpenBSD-Dynamic-Loader-Privilege-Escalation.html http://packetstormsecurity.com/files/155764/OpenBSD-Dynamic-Loader-chpass-Privilege-Escalation.html http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html http://seclists.org/fulldisclosure/2019/Dec/31 http://seclists.org/fulldisclosure/2023/Oct/11 http://www.openwall.com/lists/ • CWE-269: Improper Privilege Management •
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: 7.1EPSS: 2%CPEs: 2049EXPL: 0CVE-2008-4609
https://notcve.org/view.php?id=CVE-2008-4609
The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operating systems allows remote attackers to cause a denial of service (connection queue exhaustion) via multiple vectors that manipulate information in the TCP state table, as demonstrated by sockstress. La implementación del protocolo TCP en (1) Linux, (2) plataformas basadas en BSD Unix, (3) Microsoft Windows, (4) productos Cisco, y probablemente otros sistemas operativos, permite a atacantes remotos provocar una denegación de servicio (agotamiento de cola de conexión) a través de múltiples vectores que manipulan información en la tabla de estados del TCP, como lo demuestra sockstress. • http://blog.robertlee.name/2008/10/conjecture-speculation.html http://insecure.org/stf/tcp-dos-attack-explained.html http://lists.immunitysec.com/pipermail/dailydave/2008-October/005360.html http://marc.info/?l=bugtraq&m=125856010926699&w=2 http://searchsecurity.techtarget.com.au/articles/27154-TCP-is-fundamentally-borked http://www.cisco.com/en/US/products/products_security_advisory09186a0080af511d.shtml http://www.cisco.com/en/US/products/products_security_response09186a0080a15120.html http://www.cpni • CWE-16: Configuration •
CVSS: 6.8EPSS: 2%CPEs: 198EXPL: 0CVE-2008-1148
https://notcve.org/view.php?id=CVE-2008-1148
A certain pseudo-random number generator (PRNG) algorithm that uses ADD with 0 random hops (aka "Algorithm A0"), as used in OpenBSD 3.5 through 4.2 and NetBSD 1.6.2 through 4.0, allows remote attackers to guess sensitive values such as (1) DNS transaction IDs or (2) IP fragmentation IDs by observing a sequence of previously generated values. NOTE: this issue can be leveraged for attacks such as DNS cache poisoning, injection into TCP packets, and OS fingerprinting. Cierto algoritmo generador de números pseudo-aleatorios(PRNG) que usa ADD con 0 saltos aleatorios(también conocido como "algoritmo A0"), usado en OpenBSD de la v3.5 a la 4.2 y NetBSD v1.6.2 a la 4.0, permite a atacantes remotos adivinar datos sensibles como (1)los IDs de una transacción DNS, (2)IDs de una fragmentación IP observando una secuencias generadas previamente. NOTA: este fallo puede ser aprovechado por ataques como el envenenamiento de la cachés DNS, la inyección de paquetes TCP y OS fingerprinting. • http://secunia.com/advisories/28819 http://www.securiteam.com/securityreviews/5PP0H0UNGW.html http://www.securityfocus.com/archive/1/487658 http://www.securityfocus.com/bid/27647 http://www.trusteer.com/docs/OpenBSD_DNS_Cache_Poisoning_and_Multiple_OS_Predictable_IP_ID_Vulnerability.pdf https://exchange.xforce.ibmcloud.com/vulnerabilities/40329 https://exchange.xforce.ibmcloud.com/vulnerabilities/41157 •