Improper Privilege Management Affecting xen-tools package, versions <4.14.3_04-3.15.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.43% (34th percentile)

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  • Snyk IDSNYK-SLES153-XENTOOLS-2651483
  • published14 Apr 2022
  • disclosed7 Dec 2021

Introduced: 7 Dec 2021

CVE-2021-28702  (opens in a new tab)
CWE-269  (opens in a new tab)

How to fix?

Upgrade SLES:15.3 xen-tools to version 4.14.3_04-3.15.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen-tools package and not the xen-tools package as distributed by SLES. See How to fix? for SLES:15.3 relevant fixed versions and status.

PCI devices with RMRRs not deassigned correctly Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR"). These are typically used for platform tasks such as legacy USB emulation. If such a device is passed through to a guest, then on guest shutdown the device is not properly deassigned. The IOMMU configuration for these devices which are not properly deassigned ends up pointing to a freed data structure, including the IO Pagetables. Subsequent DMA or interrupts from the device will have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

CVSS Base Scores

version 3.1