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CVSS: 7.1EPSS: 0%CPEs: 35EXPL: 0

The do_mmu_update function in arch/x86/mm.c in Xen 3.2.x through 4.4.x does not properly manage page references, which allows remote domains to cause a denial of service by leveraging control over an HVM guest and a crafted MMU_MACHPHYS_UPDATE. La función do_mmu_update en arch/x86/mm.c en Xen 3.2.x hasta 4.4.x no maneja debidamente las referencias de páginas, lo que permite a dominios remotos causar una denegación de servicio mediante el aprovechamiento del control sobre un invitado HVM y un MMU_MACHPHYS_UPDATE manipulado. • http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html http://secunia.com/advisories/62672 http://www.debian.org/security/2015/dsa-3140 http://www.securityfocus.com/bid/71207 http://xenbits.xen.org/xsa/advisory-113.html https://exchange.xforce.ibmcloud.com/vulnerabilities/98853 https://security.gentoo.org/glsa/201504-04 • CWE-20: Improper Input Validation •

CVSS: 1.9EPSS: 0%CPEs: 33EXPL: 0

arch/x86/x86_emulate/x86_emulate.c in Xen 3.2.1 through 4.4.x does not properly check privileges, which allows local HVM guest users to gain privileges or cause a denial of service (crash) via a crafted (1) CALL, (2) JMP, (3) RETF, (4) LCALL, (5) LJMP, or (6) LRET far branch instruction. El fichero arch/x86/x86_emulate.c in Xen 3.2.1 hasta 4.4.x no comprueba correctamente los privilegios, lo que permite a los usuarios invitados HVM locales conseguir privilegios o causar una denegación de servicio (caída) a través de una instrucción manipulada de rama lejana (1) CALL, (2) JMP, (3) RETF, (4) LCALL, (5) LJMP, o (6) LRET. • http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html http://secunia.com/advisories/62537 http://secunia.com/advisories/62672 http://support.citrix.com/article/CTX200288 http://support.citrix.com/article/CTX201794 http://www.debian.org/security/2015/dsa-3140 http://www.securityfocus.com/bid/71151 http://xenbits.xen.org/xsa/advisory-110.html https://exchange.xforce.ibmcloud.com/vulnerabilities&#x • CWE-17: DEPRECATED: Code •

CVSS: 5.4EPSS: 0%CPEs: 21EXPL: 0

The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging (HAP). La función do_mmu_update en arch/x86/mm.c en Xen 4.x hasta la versión 4.4.x no restringe adecuadamente las actualizaciones a las tablas de página sólo para PV, lo que permite a invitados PV remotos provocar una denegación de servicio (referencia a puntero NULL) aprovechando los servicios de emulación de hardware para invitados HVM que utilizan Hardware Assisted Paging (HAP). • http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html http://secunia.com/advisories/62672 http://www.debian.org/security/2015/dsa-3140 http://www.securityfocus.com/bid/71149 http://xenbits.xen.org/xsa/advisory-109.html https://exchange.xforce.ibmcloud.com/vulnerabilities/98767 https://security.gentoo.org/glsa/201504-04 • CWE-20: Improper Input Validation •

CVSS: 5.0EPSS: 8%CPEs: 15EXPL: 4

Multiple Integer underflows in the geonet_print function in tcpdump 4.5.0 through 4.6.2, when in verbose mode, allow remote attackers to cause a denial of service (segmentation fault and crash) via a crafted length value in a Geonet frame. Múltiples subdesbordamientos de enteros en la función geonet_print en tcpdump 4.5.0 hasta 4.6.2, cuando se utiliza el modo verbose, permite a atacantes remotos causar una denegación de servicio (fallo de segmentación y caída) a través de un valor de longitud manipulado en un Frame Geonet. tcpdump versions 4.5.0 through 4.6.2 suffers from a denial of service vulnerability when handling a malformed Geonet payload. • https://www.exploit-db.com/exploits/35359 http://lists.opensuse.org/opensuse-updates/2015-02/msg00062.html http://packetstormsecurity.com/files/129156/tcpdump-4.6.2-Geonet-Denial-Of-Service.html http://seclists.org/fulldisclosure/2014/Nov/48 http://www.exploit-db.com/exploits/35359 http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html http://www.securityfocus.com/archive/1/534010/100/0/threaded http://www.securityfocus.com/bid/71155 http://www.ubuntu.com/ • CWE-191: Integer Underflow (Wrap or Wraparound) •

CVSS: 5.0EPSS: 5%CPEs: 19EXPL: 3

Integer underflow in the olsr_print function in tcpdump 3.9.6 through 4.6.2, when in verbose mode, allows remote attackers to cause a denial of service (crash) via a crafted length value in an OLSR frame. Subdesbordamiento de enteros en la función olsr_print en tcpdump 3.9.6 hasta 4.6.2, cuando está en el modo verbose, permite a atacantes remotos causar una denegación de servicio(caída) a través de valor de longitud manipulado en un Frame OLSR. tcpdump versions 3.9.6 through 4.6.2 suffers from a denial of service vulnerability when handling a malformed OLSR payload. • http://advisories.mageia.org/MGASA-2014-0503.html http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html http://lists.opensuse.org/opensuse-updates/2015-02/msg00062.html http://packetstormsecurity.com/files/129155/tcpdump-4.6.2-OSLR-Denial-Of-Service.html http://seclists.org/fulldisclosure/2014/Nov/47 http://www.debian.org/security/2014/dsa-3086 http://www.mandriva.com/security/advisories?name=MDVSA-2014:240 http://www.mandriva.com/security/advisories?name=MDVSA-2015: • CWE-189: Numeric Errors •