PT-2016-6810 · Xen+1 · Xen+1

Andrew Cooper · Published 2016-08-02 · Updated 2024-06-15 · CVE-2016-6259

Positive Technologies (AI Summary)

CVSS v3.1

6.2

Medium

Base vector

AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Xen versions 4.5.x through 4.7.x

Description The issue allows local 32-bit PV guest OS kernels to cause a denial of service, resulting in a hypervisor and VM crash, by triggering a safety check due to the lack of Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery.

Recommendations For Xen versions 4.5.x through 4.7.x, consider disabling 32-bit PV guest OS kernels until a patch is available to implement SMAP whitelisting and prevent the denial of service.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2016-6259

MGASA-2017-0012

OPENSUSE-SU-2016_2494-1

OPENSUSE-SU-2024:10196-1

SUSE-SU-2016:2093-1

SUSE-SU-2016:2473-1

Affected Products

Suse

Xen

References · 263

• https://ubuntu.com/security/CVE-2016-6259 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2016-6259 · Vendor Advisory
• http://xenbits.xen.org/xsa/advisory-183.html · Patch
• https://osv.dev/vulnerability/SUSE-SU-2016:2093-1 · Vendor Advisory
• http://xenbits.xen.org/xsa/xsa183-unstable.patch · Patch
• https://osv.dev/vulnerability/CVE-2016-6259 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2017-0012.html · Security Note
• http://xenbits.xen.org/xsa/xsa183-4.6.patch · Patch
• https://osv.dev/vulnerability/MGASA-2017-0012 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10196-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-6259 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-6259 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2016-6259 · Security Note
• http://support.citrix.com/article/CTX214954 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2016:2473-1 · Vendor Advisory