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Last updated: 12/19/2014 5:54:53 AM

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Vulnerability Summary for CVE-2008-5716

Original release date: 12/24/2008
Last revised: 01/06/2009
Source: US-CERT/NIST

Overview

xend in Xen 3.3.0 does not properly restrict a guest VM's write access within the /local/domain xenstore directory tree, which allows guest OS users to cause a denial of service and possibly have unspecified other impact by writing to (1) console/tty, (2) console/limit, or (3) image/device-model-pid. NOTE: this issue exists because of erroneous set_permissions calls in the fix for CVE-2008-4405.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.2 (HIGH) (AV:L/AC:L/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

Vendor Statements (disclaimer)

Official Statement from Red Hat (01/07/2009)
Not vulnerable. This issue did not affect the versions of Xen as shipped with Red Hat Enterprise Linux 5. Security update released to address CVE-2008-4405 - https://rhn.redhat.com/errata/RHSA-2009-0003.html - contained correct patch which did not introduce this problem and resolved the original issue.

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External Source: MLIST
Name: [xen-devel] 20081218 Re: PATCH: Actually make /local/domain/$DOMID readonly to the guest
External Source: MLIST
Name: [oss-security] 20081219 CVE Request -- Xen (Upstream patch for CVE-2008-4405 is incomplete)
External Source: MLIST
Name: [xen-devel] 20081218 Re: PATCH: Actually make /local/domain/$DOMID readonly to the guest
External Source: BID
Name: 31499
External Source: MLIST
Name: [xen-devel] 20081218 Re: PATCH: Actually make /local/domain/$DOMID readonly to the guest
External Source: MLIST
Name: [xen-devel] 20081218 PATCH: Actually make /local/domain/$DOMID readonly to the guest
External Source: XF
Name: xen-xend-xenstore-dos(47668)

Vulnerable software and versions

+ Configuration 1
+ OR
* cpe:/a:citrix:xen:3.3.0

* Denotes Vulnerable Software
Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)