Access Restriction Bypass Affecting qemu package, versions <1:2.1+dfsg-12


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.06% (31st percentile)

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  • Snyk IDSNYK-DEBIAN8-QEMU-427946
  • published1 Apr 2015
  • disclosed1 Apr 2015

Introduced: 1 Apr 2015

CVE-2015-2756  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Debian:8 qemu to version 1:2.1+dfsg-12 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Debian. See How to fix? for Debian:8 relevant fixed versions and status.

QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.

CVSS Scores

version 3.1