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CVE-2014-8134

Status Candidate

Overview

The paravirt_ops_setup function in arch/x86/kernel/kvm.c in the Linux kernel through 3.18 uses an improper paravirt_enabled setting for KVM guest kernels, which makes it easier for guest OS users to bypass the ASLR protection mechanism via a crafted application that reads a 16-bit value.

Related Files

Red Hat Security Advisory 2016-0855-01
Posted May 11, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0855-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was found that reporting emulation failures to user space could lead to either a local or a L2->L1 denial of service. In the case of a local denial of service, an attacker must have access to the MMIO area or be able to access an I/O port. Please note that on certain systems, HPET is mapped to userspace as part of vdso and thus an unprivileged user may generate MMIO transactions this way.

tags | advisory, denial of service, kernel, local
systems | linux, redhat
advisories | CVE-2010-5313, CVE-2013-4312, CVE-2014-7842, CVE-2014-8134, CVE-2015-5156, CVE-2015-7509, CVE-2015-8215, CVE-2015-8324, CVE-2015-8543
SHA-256 | 04e242034fb3ec62c7605bb20048f0fac25d6bf4a31d5570797bd3c137afe067
Ubuntu Security Notice USN-2464-1
Posted Jan 13, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2464-1 - Andy Lutomirski discovered that the Linux kernel does not properly handle faults associated with the Stack Segment (SS) register in the x86 architecture. A local attacker could exploit this flaw to gain administrative privileges. An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Various other issues were also addressed.

tags | advisory, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-7842, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090, CVE-2014-9322
SHA-256 | f75d7cc0dcd4758392f8801245cba456c9322b7d08a6a0f867821d681a4df56c
Ubuntu Security Notice USN-2448-2
Posted Dec 20, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2448-2 - USN-2448-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated regression TCP Throughput drops to zero for several drivers after upgrading. This update fixes the problem. An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, tcp, vulnerability, protocol
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7825, CVE-2014-7826, CVE-2014-7970, CVE-2014-8086, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090
SHA-256 | c47545b18e641e882b45a3c426edabfd912ad269d8872340a45d7660ebe5e154
Ubuntu Security Notice USN-2447-2
Posted Dec 20, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2447-2 - USN-2447-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated regression TCP Throughput drops to zero for several drivers after upgrading. This update fixes the problem. An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, tcp, vulnerability, protocol
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7825, CVE-2014-7826, CVE-2014-7970, CVE-2014-8086, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090
SHA-256 | 48836bea6415674b21cc9d2e67d419022278c5cdd948c6b798dbc7a87a1e15be
Ubuntu Security Notice USN-2448-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2448-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7825, CVE-2014-7826, CVE-2014-7970, CVE-2014-8086, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090
SHA-256 | cc26cddcf990c6e4806b8a2830ba32c515f3b08214bf8c6381b965ed04395de6
Ubuntu Security Notice USN-2444-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2444-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-7825, CVE-2014-7826, CVE-2014-7841, CVE-2014-8134, CVE-2014-8884, CVE-2014-9090
SHA-256 | 8d55b495c08c469f393a908849b08199e4e913ec6381b4b38d921293f81b5df4
Ubuntu Security Notice USN-2447-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2447-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7825, CVE-2014-7826, CVE-2014-7970, CVE-2014-8086, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090
SHA-256 | df1d53cc9704187a3bff3f08f70b26ee26d8e4cf0a0fd71fa2bd5ced9530d3d6
Ubuntu Security Notice USN-2446-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2446-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7825, CVE-2014-7826, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090
SHA-256 | 8e8cdac6a89c267aaf2a3f6860b6f66859cff32a439578520916813950701dd3
Ubuntu Security Notice USN-2445-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2445-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7825, CVE-2014-7826, CVE-2014-8134, CVE-2014-8369, CVE-2014-9090
SHA-256 | 94e812239191ebdb5a1cef87d91adbdb63a8e570f57301b832942b8b783b3c83
Ubuntu Security Notice USN-2443-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2443-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. Rabin Vincent, Robert Swiecki, Russell King discovered that the ftrace subsystem of the Linux kernel does not properly handle private syscall numbers. A local user could exploit this flaw to cause a denial of service (OOPS). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2014-7825, CVE-2014-7826, CVE-2014-7841, CVE-2014-8134, CVE-2014-8884, CVE-2014-9090
SHA-256 | cf6047ccb1b24e003bd8fa8a4bde8410e0623e015f81104c409931c57084f548
Ubuntu Security Notice USN-2442-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2442-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, protocol
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7841, CVE-2014-8134, CVE-2014-8709, CVE-2014-8884, CVE-2014-9090
SHA-256 | 288267c834792a8e3246504ad1734c3fe48f348a5065045fb6df325ec1dcf9ee
Ubuntu Security Notice USN-2441-1
Posted Dec 12, 2014
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2441-1 - An information leak in the Linux kernel was discovered that could leak the high 16 bits of the kernel stack address on 32-bit Kernel Virtual Machine (KVM) paravirt guests. A user in the guest OS could exploit this leak to obtain information that could potentially be used to aid in attacking the kernel. A flaw in the handling of malformed ASCONF chunks by SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel was discovered. A remote attacker could exploit this flaw to cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, protocol
systems | linux, ubuntu
advisories | CVE-2014-3673, CVE-2014-3687, CVE-2014-3688, CVE-2014-7841, CVE-2014-8134, CVE-2014-8709, CVE-2014-8884, CVE-2014-9090
SHA-256 | 351ac93482ab04f44a623a4251f21fe15ca92d2c32eaf98a44a99b4d5a247b0e
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