CVSS: 5.5EPSS: 0%CPEs: 5EXPL: 0CVE-2014-3611 – kernel: kvm: PIT timer race condition
https://notcve.org/view.php?id=CVE-2014-3611
Race condition in the __kvm_migrate_pit_timer function in arch/x86/kvm/i8254.c in the KVM subsystem in the Linux kernel through 3.17.2 allows guest OS users to cause a denial of service (host OS crash) by leveraging incorrect PIT emulation. Condición de carrera en la función __kvm_migrate_pit_timer en arch/x86/kvm/i8254.c en el subsistema KVM en el kernel de Linux hasta 3.17.2 permite a usuarios del sistema operativo invitado causar una denegación de servicio (caída del sistema operativo anfitrión) mediante el aprovechamiento de la emulación PIT incorrecta. A race condition flaw was found in the way the Linux kernel's KVM subsystem handled PIT (Programmable Interval Timer) emulation. A guest user who has access to the PIT I/O ports could use this flaw to crash the host. • http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2febc839133280d5a5e8e1179c94ea674489dae2 http://rhn.redhat.com/errata/RHSA-2015-0126.html http://rhn.redhat.com/errata/RHSA-2015-0284.html http://rhn.redhat.com/errata/RHSA-2015-0869.html http://www.debian.org/security/2014/dsa-3060 http://www.openwall.com/lists/oss-security/2014/10/24/9 http://www.ubuntu.com/usn/USN-2394-1 http://www.ubuntu.com/usn/USN-2417-1 http://www.ubun • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 4.7EPSS: 0%CPEs: 272EXPL: 0CVE-2014-3645 – kernel: kvm: vmx: invept vm exit not handled
https://notcve.org/view.php?id=CVE-2014-3645
arch/x86/kvm/vmx.c in the KVM subsystem in the Linux kernel before 3.12 does not have an exit handler for the INVEPT instruction, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application. arch/x86/kvm/vmx.c en el subsistema KVM en el kernel de Linux anterior a 3.12 no tiene un manejador de salida para la instrucción INVEPT, lo que permite a usuarios del sistema operativo invitado causar una denegación de servicio (caída del sistema operativo invitado) a través de una aplicación manipulada. It was found that the Linux kernel's KVM subsystem did not handle the VM exits gracefully for the invept (Invalidate Translations Derived from EPT) instructions. On hosts with an Intel processor and invept VM exit support, an unprivileged guest user could use these instructions to crash the guest. • http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bfd0a56b90005f8c8a004baf407ad90045c2b11e http://rhn.redhat.com/errata/RHSA-2015-0126.html http://rhn.redhat.com/errata/RHSA-2015-0284.html http://www.debian.org/security/2014/dsa-3060 http://www.openwall.com/lists/oss-security/2014/10/24/9 http://www.ubuntu.com/usn/USN-2417-1 http://www.ubuntu.com/usn/USN-2418-1 https://bugzilla.redhat.com/show_bug.cgi?id=1144835 https://github • CWE-20: Improper Input Validation CWE-248: Uncaught Exception •
CVSS: 5.5EPSS: 0%CPEs: 5EXPL: 0CVE-2014-7975 – Kernel: fs: umount denial of service
https://notcve.org/view.php?id=CVE-2014-7975
The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call. La función do_umount en fs/namespace.c en el kernel de Linux hasta 3.17 no requiere la capacidad CAP_SYS_ADMIN para llamadas do_remount_sb que cambian el sistema de ficheros root a sólo lectura, lo que permite a usuarios locales causar una denegación de servicio (pérdida de la habilidad de escritura) mediante la realización de ciertas llamadas a la liberación de sistemas, la limpieza del indicador / MNT_LOCKED, y la realización de una llamada al sistema umount MNT_FORCE. • http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5 http://secunia.com/advisories/60174 http://secunia.com/advisories/61145 http://secunia.com/advisories/62633 http://secunia.com/advisories/62634 http://thread.gmane.org/gmane.linux.kernel.stable/109312 http://www.openwall.com/lists/oss-security/2014/10/08/22 http://www.securityfocus.com/bid/70314 http://www.securitytracker.com/id/1031180 http://www.ubuntu.com/usn/US •
CVSS: 4.9EPSS: 0%CPEs: 2EXPL: 3CVE-2014-7283 – kernel: xfs: directory hash ordering denial of service
https://notcve.org/view.php?id=CVE-2014-7283
The xfs_da3_fixhashpath function in fs/xfs/xfs_da_btree.c in the xfs implementation in the Linux kernel before 3.14.2 does not properly compare btree hash values, which allows local users to cause a denial of service (filesystem corruption, and OOPS or panic) via operations on directories that have hash collisions, as demonstrated by rmdir operations. La función xfs_da3_fixhashpath en fs/xfs/xfs_da_btree.c en la implementación xfs en el kernel de Linux anterior a 3.14.2 no compara debidamente los valores de hashes btree, lo que permite a usuarios locales causar una denegación de servicio (corrupción del sistema de ficheros y OOPS o pánico) a través de operaciones sobre directorios que tienen colisiones de hashes, tal y como fue demostrado por operaciones rmdir. A denial of service flaw was found in the way the Linux kernel's XFS file system implementation ordered directory hashes under certain conditions. A local attacker could use this flaw to corrupt the file system by creating directories with colliding hash values, potentially resulting in a system crash. • http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c88547a8119e3b581318ab65e9b72f27f23e641d http://marc.info/?l=linux-xfs&m=139590613002926&w=2 http://rhn.redhat.com/errata/RHSA-2014-1943.html http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.2 http://www.openwall.com/lists/oss-security/2014/10/01/29 http://www.securityfocus.com/bid/70261 https://bugzilla.redhat.com/show_bug.cgi?id=1148777 https://github.com/torvalds/linux/co • CWE-399: Resource Management Errors •
CVSS: 4.7EPSS: 0%CPEs: 2EXPL: 3CVE-2014-8086 – Kernel: fs: ext4 race condition
https://notcve.org/view.php?id=CVE-2014-8086
Race condition in the ext4_file_write_iter function in fs/ext4/file.c in the Linux kernel through 3.17 allows local users to cause a denial of service (file unavailability) via a combination of a write action and an F_SETFL fcntl operation for the O_DIRECT flag. Condición de carrera en la función ext4_file_write_iter en fs/ext4/file.c en el kernel de Linux hasta 3.17 permite a usuarios locales causar una denegación de servicio (no disponibilidad de ficheros) a través de una combinación de una acción de escritura y una operación F_SETFL fcntl para el indicador O_DIRECT. A race condition flaw was found in the Linux kernel's ext4 file system implementation that allowed a local, unprivileged user to crash the system by simultaneously writing to a file and toggling the O_DIRECT flag using fcntl(F_SETFL) on that file. • http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00004.html http://rhn.redhat.com/errata/RHSA-2015-0290.html http://rhn.redhat.com/errata/RHSA-2015-0694.html http://www.openwall.com/lists/oss-security/2014/10/09/25 http://www.securityfocus.com/bid/70376 http://www.spinics.net/lists/linux-ext4/msg45683.html http://www.spinics.net/lists/linux-ext4/msg45685.html https://bugzilla.redhat.com/show_bug.cgi?id=1151353 https://exchange.xforce.ibmcloud.com/vulnerabi • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •