PT-2015-7802 · Citrix+2 · Xen+2
Konrad Rzeszutek Wilk
·
Published
2015-12-17
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Updated
2017-11-04
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CVE-2015-8552
CVSS v3.1
4.4
Medium
| Vector | AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Xen versions 3.1.x through 4.3.x
Description
The issue allows local guest administrators to generate a continuous stream of WARN messages and cause a denial of service by consuming disk space. This can be achieved by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and utilizing
XEN PCI OP enable msi operations.Recommendations
For versions 3.1.x through 4.3.x, consider restricting access to the
XEN PCI OP enable msi operations to prevent the generation of a continuous stream of WARN messages and subsequent denial of service. As a temporary workaround, limit the ability of local guest administrators to access passed-through MSI or MSI-X capable physical PCI devices until a patch is available.Exploit
Fix
DoS
RCE
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Weakness Enumeration
Related Identifiers
Affected Products
Suse
Ubuntu
Xen