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CVE-2015-8104

Status Candidate

Overview

The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c.

Related Files

Red Hat Security Advisory 2016-0103-01
Posted Feb 3, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0103-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the x86 ISA is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way delivering of benign exceptions such as #DB is handled. A privileged user inside a guest could use this flaw to create denial of service conditions on the host kernel. A use-after-free flaw was found in the way the Linux kernel's key management subsystem handled keyring object reference counting in certain error path of the join_session_keyring() function. A local, unprivileged user could use this flaw to escalate their privileges on the system.

tags | advisory, denial of service, x86, kernel, local
systems | linux, redhat
advisories | CVE-2015-8104, CVE-2016-0728, CVE-2016-0774
SHA-256 | 9927db3d6722b1df950202392e8bc511c9d1a2eb779e99e2d270206e4e63aa86
Debian Security Advisory 3454-1
Posted Jan 27, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3454-1 - Multiple vulnerabilities have been discovered in VirtualBox, an x86 virtualisation solution.

tags | advisory, x86, vulnerability
systems | linux, debian
advisories | CVE-2015-5307, CVE-2015-8104, CVE-2016-0495, CVE-2016-0592
SHA-256 | 136e69f73fdf63ba39f28da933af0cb4bc9773576e34a8eca44649ebf4d8bee2
Red Hat Security Advisory 2016-0046-01
Posted Jan 19, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0046-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the x86 ISA is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way delivering of benign exceptions such as #AC and #DB is handled. A privileged user inside a guest could use these flaws to create denial of service conditions on the host kernel.

tags | advisory, denial of service, x86, kernel
systems | linux, redhat
advisories | CVE-2015-5307, CVE-2015-8104
SHA-256 | 325fe8756746b88da4391cbf34519517608d15ece7b92efec85da1495504765b
Red Hat Security Advisory 2016-0024-01
Posted Jan 12, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0024-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the x86 ISA is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way delivering of benign exceptions such as #AC and #DB is handled. A privileged user inside a guest could use these flaws to create denial of service conditions on the host kernel.

tags | advisory, denial of service, x86, kernel
systems | linux, redhat
advisories | CVE-2015-5307, CVE-2015-8104
SHA-256 | 5e0c3c6dc7d454657950f76fcf7f8a7193a45b84c6fe39b7cf9a405bdfa5ce2d
Red Hat Security Advisory 2016-0004-01
Posted Jan 7, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0004-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the x86 ISA is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way delivering of benign exceptions such as #AC and #DB is handled. A privileged user inside a guest could use these flaws to create denial of service conditions on the host kernel.

tags | advisory, denial of service, x86, kernel
systems | linux, redhat
advisories | CVE-2015-5307, CVE-2015-8104
SHA-256 | 7b6c1de75da65d611115bc77583ed4b8a46c10ea69c41a966860776907c7ffa6
Debian Security Advisory 3426-1
Posted Dec 18, 2015
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3426-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service, information leak or data loss.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2013-7446, CVE-2015-7799, CVE-2015-7833, CVE-2015-8104, CVE-2015-8374, CVE-2015-8543
SHA-256 | eefa8528c8f76d273a5ac0c5e68a8ee3b0c177db643785311de84b9e1b210774
Ubuntu Security Notice USN-2843-2
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2843-2 - Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. It was discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7799, CVE-2015-7872, CVE-2015-7884, CVE-2015-7885, CVE-2015-8104
SHA-256 | c5e55d2c73f862fc096ea1440ff05f9e135387c9eb19edd0e68e6a85dc021481
Ubuntu Security Notice USN-2844-1
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2844-1 - Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. It was discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7799, CVE-2015-7885, CVE-2015-8104
SHA-256 | b4cd0bc253990e55a6ecc2c204566cda6ed9cd5f6cf7e24e01d7c2684add877f
Ubuntu Security Notice USN-2843-1
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2843-1 - Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. It was discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7799, CVE-2015-7872, CVE-2015-7884, CVE-2015-7885, CVE-2015-8104
SHA-256 | f479df664dd8312e1d62280d98193f75f0d711e3ff7b1a9290dd88a9b27a19bc
Ubuntu Security Notice USN-2842-2
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2842-2 - Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. It was discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7799, CVE-2015-7884, CVE-2015-7885, CVE-2015-8104
SHA-256 | a5afc6600211fee4092359c7676a6587ef99dbb6b0927cfbf42276bdf656c3e8
Ubuntu Security Notice USN-2842-1
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2842-1 - Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. It was discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7799, CVE-2015-7884, CVE-2015-7885, CVE-2015-8104
SHA-256 | f15c2f33f4786bc4f7ee04869838e57eaef6dac30e29cec3994dd7170aca39f8
Ubuntu Security Notice USN-2841-2
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2841-2 - Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. It was discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7799, CVE-2015-7885, CVE-2015-8104
SHA-256 | aab7b8a18a2eeea06d3bd68e70d7384b8208fa178992a4e636bcea7bb44436e4
Ubuntu Security Notice USN-2841-1
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2841-1 - Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. It was discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash). Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7799, CVE-2015-7885, CVE-2015-8104
SHA-256 | feea045271b1b06eb4f378183ee7bc3c161927c90e23d465be242578c3050baa
Ubuntu Security Notice USN-2840-1
Posted Dec 17, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2840-1 - Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted to garbage collect incompletely instantiated keys. A local unprivileged attacker could use this to cause a denial of service (system crash). Jan Beulich discovered that the KVM svm hypervisor implementation in the Linux kernel did not properly catch Debug exceptions on AMD processors. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-7872, CVE-2015-8104
SHA-256 | 80fb709cf813138ac610699be9a980c35f20439568f9d3a1af1dc62faaed2bb6
Red Hat Security Advisory 2015-2645-01
Posted Dec 16, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2645-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the x86 ISA is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way delivering of benign exceptions such as #AC and #DB is handled. A privileged user inside a guest could use these flaws to create denial of service conditions on the host kernel.

tags | advisory, denial of service, x86, kernel
systems | linux, redhat
advisories | CVE-2015-5307, CVE-2015-8104
SHA-256 | 1eaa38879d61df7e4e738bd45846748a4a11d981895d4fcaf3f2a8c945f60674
Red Hat Security Advisory 2015-2636-01
Posted Dec 16, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2636-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's file system implementation handled rename operations in which the source was inside and the destination was outside of a bind mount. A privileged user inside a container could use this flaw to escape the bind mount and, potentially, escalate their privileges on the system. It was found that the x86 ISA is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way delivering of benign exceptions such as #AC and #DB is handled. A privileged user inside a guest could use these flaws to create denial of service conditions on the host kernel.

tags | advisory, denial of service, x86, kernel
systems | linux, redhat
advisories | CVE-2015-2925, CVE-2015-5307, CVE-2015-7613, CVE-2015-7872, CVE-2015-8104
SHA-256 | 4c9d3dc7b4a5862f13ddb25c6fe1d7ed8bae4329d542c363dd404d810e5e5967
Debian Security Advisory 3414-1
Posted Dec 10, 2015
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3414-1 - Multiple security issues have been found in the Xen virtualisation solution, which may result in denial of service or information disclosure.

tags | advisory, denial of service, info disclosure
systems | linux, debian
advisories | CVE-2015-3259, CVE-2015-3340, CVE-2015-5307, CVE-2015-6654, CVE-2015-7311, CVE-2015-7812, CVE-2015-7813, CVE-2015-7814, CVE-2015-7969, CVE-2015-7970, CVE-2015-7971, CVE-2015-7972, CVE-2015-8104
SHA-256 | 78a4693f6a6b43fb82c9d63e085c9afe3e278de9ff692fe7f1d211ef3c565859
Red Hat Security Advisory 2015-2552-01
Posted Dec 8, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2552-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the x86 ISA is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way delivering of benign exceptions such as #AC and #DB is handled. A privileged user inside a guest could use these flaws to create denial of service conditions on the host kernel.

tags | advisory, denial of service, x86, kernel
systems | linux, redhat
advisories | CVE-2015-5307, CVE-2015-8104
SHA-256 | 421ad6b6ea77c1424cf5e393206e57d786896019194f078c110c0d12105ef4ca
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