kernel: xen: Several memory hypercall operations allow invalid extent order values

The 1 XENMEMdecreasereservation, 2 XENMEMpopulatephysmap, and 3 XENMEMexchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service long loop and hang via a crafted extentorder value...

DEBIAN-CVE-2012-5515

The 1 XENMEMdecreasereservation, 2 XENMEMpopulatephysmap, and 3 XENMEMexchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service long loop and hang via a crafted extentorder value...

CVE-2012-5515

The 1 XENMEMdecreasereservation, 2 XENMEMpopulatephysmap, and 3 XENMEMexchange hypercalls in Xen 4.2 and earlier allow local guest administrators to cause a denial of service long loop and hang via a crafted extentorder value...

several hypercalls do not validate input GFNs

ISSUE DESCRIPTION The function getpagefromgfn does not validate its input GFN. An invalid GFN passed to a hypercall which uses this function will cause the hypervisor to read off the end of the frame table and potentially crash. IMPACT A malicious guest administrator of a PV guest can cause Xen t...

kernel: xen: off-by-one shift in x86_64 __addr_ok()

Off-by-one error in the addrok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service host crash via unspecified hypercalls that ignore virtual-address bits...

PT-2013-1400 · Xen +1 · Xen +1

Name of the Vulnerable Software and Affected Versions: Xen versions 3.3 and earlier Description: The issue is related to an off-by-one error in the addr ok macro, which can be exploited by local 64-bit PV guest administrators to cause a denial of service, resulting in a host crash. This can be...

Debian DSA-1907-1 : kvm - several vulnerabilities

Several vulnerabilities have been discovered in kvm, a full virtualization system. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2008-5714 Chris Webb discovered an off-by-one bug limiting KVM's VNC passwords to 7 characters. This flaw might make it...

Debian: Security Advisory (DSA-1907-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2009 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

DSA-1907-1 kvm - several vulnerabilities

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kvm privilege escalation

kvmemulatehypercall doesn't filter MMU hypercalls from ring 0...

kernel: KVM: x86: Disallow hypercalls for guest callers in rings > 0

The kvmemulatehypercall function in arch/x86/kvm/x86.c in KVM in the Linux kernel 2.6.25-rc1, and other versions before 2.6.31, when running on x86 systems, does not prevent access to MMU hypercalls from ring 0, which allows local guest OS users to cause a denial of service guest kernel crash and...