Debian DLA-571-1 : xen security update (Bunker Buster)

Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems : CVE-2014-3672 XSA-180 Andrew Sorensen discovered that a HVM domain can exhaust the hosts disk space by filling up the log file. CVE-2016-3158,...

CVE-2016-2143

It was reported that on s390x, the fork of a process with four page table levels will cause memory corruption with a variety of symptoms. All processes are created with three level page table and a limit of 4TB for the address space. If the parent process has four page table levels with a limit o...

Memory corruption

The guestwalktables function in arch/x86/mm/guestwalk.c in Xen 4.6.x and earlier does not properly handle the Page Size PS page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory...

CVE-2016-4480

The guestwalktables function in arch/x86/mm/guestwalk.c in Xen 4.6.x and earlier does not properly handle the Page Size PS page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory...

x86 software guest page walk PS bit handling flaw

ISSUE DESCRIPTION The Page Size PS page table entry bit exists at all page table levels other than L1. Its meaning is reserved in L4, and conditionally reserved in L3 and L2 depending on hardware capabilities. The software page table walker in the hypervisor, however, so far ignored that bit in L...

Linux kernel-table levels denial of service vulnerability

The Linux kernel is the kernel used by the operating system Linux, released by the Linux Foundation in the United States. A denial of service vulnerability exists in the fork implementation of Linux kernel versions prior to 4.5 on the s390 platform, which stems from the program failing to properl...

Design/Logic Flaw

The fork implementation in the Linux kernel before 4.5 on s390 platforms mishandles the case of four page-table levels, which allows local users to cause a denial of service system crash or possibly have unspecified other impact via a crafted application, related to...

PT-2016-5026 · Linux +3 · Linux Kernel +3

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 4.5 on s390 platforms Description: The fork implementation in the Linux kernel mishandles the case of four page-table levels, allowing local users to cause a denial of service system crash or possibly have...

CVE-2016-1570

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier MFN to the 1 MMUEXTMARKSUPER or 2...

DEBIAN-CVE-2016-1570

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier MFN to the 1 MMUEXTMARKSUPER or 2...

xen-kernel -- PV superpage functionality missing sanity checks

The Xen Project reports: The PV superpage functionality lacks certain validity checks on data being passed to the hypervisor by guests. This is the case for the page identifier MFN passed to MMUEXTMARKSUPER and MMUEXTUNMARKSUPER sub-ops of the HYPERVISORmmuextop hypercall as well as for various...

Debian DSA-3390-1 : xen - security update

It was discovered that the code to validate level 2 page table entries is bypassed when certain conditions are satisfied. A malicious PV guest administrator can take advantage of this flaw to gain privileges via a crafted superpage mapping. %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The...

DSA-3390-1 xen - security update

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DEBIAN-CVE-2015-7835

The modl2entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping...

Design/Logic Flaw

The modl2entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping...

CVE-2015-7835

The modl2entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping...

Mac OS X Multiple EFI Vulnerabilities (EFI Security Update 2015-001)

The remote Mac OS X host is running EFI firmware that is affected by multiple vulnerabilities : - An insufficient locking issue exists, when resuming from sleep states, which allows a local attacker to write to the EFI flash memory by using an crafted application with root privileges. CVE-2015-36...

Scientific Linux Security Update : kernel on SL7.x x86_64 (20150305)

A flaw was found in the way the Linux kernel's XFS file system handled replacing of remote attributes under certain conditions. A local user with access to XFS file system mount could potentially use this flaw to escalate their privileges on the system. CVE-2015-0274, Important It was found that...

kernel: NULL pointer dereference in madvise(MADV_WILLNEED) support

A NULL pointer dereference flaw was found in the way the Linux kernel's madvise MADVWILLNEED functionality handled page table locking. A local, unprivileged user could use this flaw to crash the system...

CVE-2014-8173

The pmdnoneortranshugeorclearbad function in include/asm-generic/pgtable.h in the Linux kernel before 3.13 on NUMA systems does not properly determine whether a Page Middle Directory PMD entry is a transparent huge-table entry, which allows local users to cause a denial of service NULL pointer...