FreeBSD : xen-kernel -- Hypervisor memory corruption due to x86 emulator flaw (83a28417-27e3-11e5-a4a5-002590263bf5)

High Nessus Plugin ID 84708

Synopsis

The remote FreeBSD host is missing a security-related update.

Description

The Xen Project reports :

Instructions with register operands ignore eventual segment overrides encoded for them. Due to an insufficiently conditional assignment such a bogus segment override can, however, corrupt a pointer used subsequently to store the result of the instruction.

A malicious guest might be able to read sensitive data relating to other guests, or to cause denial of service on the host. Arbitrary code execution, and therefore privilege escalation, cannot be excluded.

Solution

Update the affected package.

See Also

http://xenbits.xen.org/xsa/advisory-123.html

http://www.nessus.org/u?c05748bb

Plugin Details

Severity: High

ID: 84708

File Name: freebsd_pkg_83a2841727e311e5a4a5002590263bf5.nasl

Version: 2.2

Type: local

Published: 2015/07/14

Updated: 2018/11/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:xen-kernel, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2015/07/11

Vulnerability Publication Date: 2015/03/10

Reference Information

CVE: CVE-2015-2151