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CVE-2013-1943

Status Candidate

Overview

The KVM subsystem in the Linux kernel before 3.0 does not check whether kernel addresses are specified during allocation of memory slots for use in a guest's physical address space, which allows local users to gain privileges or obtain sensitive information from kernel memory via a crafted application, related to arch/x86/kvm/paging_tmpl.h and virt/kvm/kvm_main.c.

Related Files

Ubuntu Security Notice USN-1940-1
Posted Sep 6, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1940-1 - Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that allows for privilege escalation. A local user could exploit this flaw to run commands as root when using the perf tool. Michael S. Tsirkin discovered a flaw in how the Linux kernel's KVM subsystem allocates memory slots for the guest's address space. A local user could exploit this flaw to gain system privileges or obtain sensitive information from kernel memory. Various other issues were also addressed.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2013-1060, CVE-2013-1943, CVE-2013-2206, CVE-2013-4162, CVE-2013-1060, CVE-2013-1943, CVE-2013-2206, CVE-2013-4162
SHA-256 | 8c59646e4e53fb3534c048dfb45e7c1eed97a9ec7d2f86a5573f81bea49edf56
Ubuntu Security Notice USN-1939-1
Posted Sep 6, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1939-1 - Vasily Kulikov discovered a flaw in the Linux Kernel's perf tool that allows for privilege escalation. A local user could exploit this flaw to run commands as root when using the perf tool. Michael S. Tsirkin discovered a flaw in how the Linux kernel's KVM subsystem allocates memory slots for the guest's address space. A local user could exploit this flaw to gain system privileges or obtain sensitive information from kernel memory. Various other issues were also addressed.

tags | advisory, kernel, local, root
systems | linux, ubuntu
advisories | CVE-2013-1060, CVE-2013-1943, CVE-2013-2206, CVE-2013-4162, CVE-2013-1060, CVE-2013-1943, CVE-2013-2206, CVE-2013-4162
SHA-256 | 3996695f9dff779a55c98d2edff73eb7307289b64e122923d7ce9b80cf0acc6d
Red Hat Security Advisory 2013-0911-01
Posted Jun 11, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0911-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way KVM initialized a guest's registered pv_eoi indication flag when entering the guest. An unprivileged guest user could potentially use this flaw to crash the host. A missing sanity check was found in the kvm_set_memory_region() function in KVM, allowing a user-space process to register memory regions pointing to the kernel address space. A local, unprivileged user could use this flaw to escalate their privileges.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2013-1935, CVE-2013-1943, CVE-2013-2017
SHA-256 | 4ea91716af9485fdaf2f63c4557f8a45dc42eca46d9ce7f61bd81b7aba88cb86
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