CVE-2015-2756

Aliases:DEBIAN-CVE-2015-2756
Advisory lineage Upstream: 0 Downstream: 7
Modified
Published: 01 Apr 2015, 14:00
Last modified:06 Aug 2024, 05:24

Vulnerability Summary

Overall Risk (default)
low
20/100
CVSS Score
4.9 MEDIUM
v2.0 (nvd)
EPSS Score
0.45% LOW
0% probability +0.33%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Apr 2015, 14:00
Published
Vulnerability first disclosed
06 Aug 2024, 05:24
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

EPSS Trends

Current EPSS score: 0.45%• Percentile: 38%

Techniques & Countermeasures

  • CWE-264•Permissions, Privileges, and Access Controls

    Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 14.10 | 15.04

  • debian•qemu

    < 1:2.3+dfsg-3 | < 1:2.3+dfsg-3 | < 1:2.3+dfsg-3 | < 1:2.3+dfsg-3

  • debian•xen

    < 4.2.0~rc2-1 | < 4.2.0~rc2-1 | < 4.2.0~rc2-1 | < 4.2.0~rc2-1

  • debian•debian_linux

    7.0 | 8.0

  • fedoraproject•fedora

    20 | 21

  • xen•xen

    4.3.0 | 4.3.1 | 4.3.2 | 4.4.0 | 4.4.1 | 4.5.0

References (14)