CVSS: 3.3EPSS: 0%CPEs: 5EXPL: 0CVE-2015-2877
https://notcve.org/view.php?id=CVE-2015-2877
Kernel Samepage Merging (KSM) in the Linux kernel 2.6.32 through 4.x does not prevent use of a write-timing side channel, which allows guest OS users to defeat the ASLR protection mechanism on other guest OS instances via a Cross-VM ASL INtrospection (CAIN) attack. NOTE: the vendor states "Basically if you care about this attack vector, disable deduplication." Share-until-written approaches for memory conservation among mutually untrusting tenants are inherently detectable for information disclosure, and can be classified as potentially misunderstood behaviors rather than vulnerabilities ** DISPUTADA ** Kernel Samepage Merging (KSM) en el kernel de Linux 2.6.32 hasta la versión 4.x no previene el uso de un canal lateral de sincronización de escritura, lo que permite a usuarios invitados del SO derrotar el mecanismo de protección de ASLR en otras instancias invitadas del SO a través de un ataque Cross-VM ASL INtrospection (CAIN). NOTA: el vendedor afirma "Básicamente si te preocupa este vector de ataque, inhabilita la deduplicación". Enfoques de compartir hasta escritura para conservación de memoria entre inquilinos mutuamente desconfiados son inherentemente detectables para divulgación de información y pueden clasificarse como comportamientos potencialmente malinterpretados en lugar de vulnerabilidades. • http://www.antoniobarresi.com/files/cain_advisory.txt http://www.kb.cert.org/vuls/id/935424 http://www.securityfocus.com/bid/76256 https://bugzilla.redhat.com/show_bug.cgi?id=1252096 https://www.kb.cert.org/vuls/id/BGAR-A2CNKG https://www.kb.cert.org/vuls/id/BLUU-9ZAHZH https://www.usenix.org/system/files/conference/woot15/woot15-paper-barresi.pdf • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 4.9EPSS: 0%CPEs: 1EXPL: 0CVE-2015-1333 – kernel: denial of service due to memory leak in add_key()
https://notcve.org/view.php?id=CVE-2015-1333
Memory leak in the __key_link_end function in security/keys/keyring.c in the Linux kernel before 4.1.4 allows local users to cause a denial of service (memory consumption) via many add_key system calls that refer to existing keys. Vulnerabilidad de fuga de memoria en la función __key_link_end en security/kesy/keyring.c en el kernel de Linux en versiones anteriores a 4.1.4, permite a usuarios locales causar una denegación de servicio (consumo de memoria) a través de muchas llamadas al sistema add_key que hacen referencia a las claves existentes. It was found that the Linux kernel's keyring implementation would leak memory when adding a key to a keyring via the add_key() function. A local attacker could use this flaw to exhaust all available memory on the system. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4da5dd1f99fe9c59f1709fb43e818b18ad20e0 http://rhn.redhat.com/errata/RHSA-2015-1778.html http://rhn.redhat.com/errata/RHSA-2015-1787.html http://www.debian.org/security/2015/dsa-3329 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.4 http://www.openwall.com/lists/oss-security/2015/07/27/7 http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html http://www.securityfocus • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-401: Missing Release of Memory after Effective Lifetime •
CVSS: 7.2EPSS: 0%CPEs: 5EXPL: 1CVE-2015-3290 – Linux Kernel - 'espfix64' Nested NMIs Interrupting Privilege Escalation
https://notcve.org/view.php?id=CVE-2015-3290
arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform improperly relies on espfix64 during nested NMI processing, which allows local users to gain privileges by triggering an NMI within a certain instruction window. Vulnerabilidad en arch/x86/entry/entry_64.S en el kernel de Linux en versiones anteriores a 4.1.6 en la plataforma x86_64, confía indebidamente en espfix64 durante el procesamiento anidado de NMI, lo que permite a usuarios locales obtener privilegios al desencadenar una NMI dentro de una cierta ventana de instrucción. Privilege escalation can occur in Linux due to nested NMIs interrupting espfix64. • https://www.exploit-db.com/exploits/37722 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b6e6a8334d56354853f9c255d1395c2ba570e0a http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html http://www.debian.org/security/2015/dsa-3313 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.6 http://www.openwall.com/lists/oss-security/2015/07/22/7 http://www.openwall.com/lists/oss-security/2015/08/04/8 http://www.securityfocus&# • CWE-264: Permissions, Privileges, and Access Controls •
CVSS: 2.1EPSS: 0%CPEs: 1EXPL: 0CVE-2015-3291
https://notcve.org/view.php?id=CVE-2015-3291
arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform does not properly determine when nested NMI processing is occurring, which allows local users to cause a denial of service (skipped NMI) by modifying the rsp register, issuing a syscall instruction, and triggering an NMI. Vulnerabilidad en arch/x86/entry/entry_64.S en el kernel de Linux en versiones anteriores a 4.1.6 en la plataforma x86_64, no determina correctamente cuándo está ocurriendo el procesamiento anidado de NMI, lo que permite a usuarios locales causar una denegación de servicio (NMI saltada) modificando el registro rsp, causando una llamada de instrucción del sistema y desencadenando una NMI. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=810bc075f78ff2c221536eb3008eac6a492dba2d http://www.debian.org/security/2015/dsa-3313 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.6 http://www.openwall.com/lists/oss-security/2015/07/22/7 http://www.securityfocus.com/bid/76003 http://www.ubuntu.com/usn/USN-2687-1 http://www.ubuntu.com/usn/USN-2688-1 http://www.ubuntu.com/usn/USN-2689-1 http://www.ubuntu.com/usn • CWE-17: DEPRECATED: Code •
CVSS: 7.2EPSS: 0%CPEs: 10EXPL: 0CVE-2015-5157 – kernel: x86-64: IRET faults during NMIs processing
https://notcve.org/view.php?id=CVE-2015-5157
arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform mishandles IRET faults in processing NMIs that occurred during userspace execution, which might allow local users to gain privileges by triggering an NMI. Vulnerabilidad en arch/x86/entry/entry_64.S en el kernel de Linux en versiones anteriores a 4.1.6 en la plataforma x86_64, no maneja correctamente los fallos IRET procesando NMIs que ocurrieron durante la ejecución en el espacio de usuario, lo que puede permitir a usuarios locales obtener privilegios mediante desencadenamiento de una NMI. A flaw was found in the way the Linux kernel handled IRET faults during the processing of NMIs. An unprivileged, local user could use this flaw to crash the system or, potentially (although highly unlikely), escalate their privileges on the system. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b6e6a8334d56354853f9c255d1395c2ba570e0a http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00009.html http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00035.html http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00026.html http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00031.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00013.html http://rhn.redhat.com • CWE-264: Permissions, Privileges, and Access Controls CWE-435: Improper Interaction Between Multiple Correctly-Behaving Entities •