FreeBSD : xen-kernel -- XENMEM_exchange error handling issues (bcad3faa-b40c-11e5-9728-002590263bf5)

medium Nessus Plugin ID 87750

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Synopsis

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

Description

The Xen Project reports :

Error handling in the operation may involve handing back pages to the domain. This operation may fail when in parallel the domain gets torn down. So far this failure unconditionally resulted in the host being brought down due to an internal error being assumed. This is CVE-2015-8339.

Furthermore error handling so far wrongly included the release of a lock. That lock, however, was either not acquired or already released on all paths leading to the error handling sequence. This is CVE-2015-8340.

A malicious guest administrator may be able to deny service by crashing the host or causing a deadlock.

Solution

Update the affected package.

Plugin Details

Severity: Medium

ID: 87750

File Name: freebsd_pkg_bcad3faab40c11e59728002590263bf5.nasl

Version: 2.3

Type: local

Family: FreeBSD Local Security Checks

Published: 1/6/2016

Updated: 1/4/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Vector: CVSS2#AV:L/AC:M/Au:N/C:N/I:N/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: 1/6/2016

Vulnerability Publication Date: 12/8/2015

Reference Information

CVE: CVE-2015-8339, CVE-2015-8340

Detections

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