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

Medium Nessus Plugin ID 87750


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


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.


Update the affected package.

See Also

Plugin Details

Severity: Medium

ID: 87750

File Name: freebsd_pkg_bcad3faab40c11e59728002590263bf5.nasl

Version: $Revision: 2.1 $

Type: local

Published: 2016/01/06

Modified: 2016/01/06

Dependencies: 12634

Risk Information

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: 2016/01/06

Vulnerability Publication Date: 2015/12/08

Reference Information

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