Out-of-bounds Write Affecting virt-devel:rhel/python3-libnbd package, versions <0:1.2.2-1.module+el8.3.0+7353+9de0a3cc


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-VIRTDEVEL-4060791
  • published26 Jul 2021
  • disclosed3 Dec 2020

Introduced: 3 Dec 2020

CVE-2020-27821  (opens in a new tab)
CWE-787  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt-devel:rhel/python3-libnbd to version 0:1.2.2-1.module+el8.3.0+7353+9de0a3cc or higher.
This issue was patched in RHSA-2021:1762.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt-devel:rhel/python3-libnbd package and not the virt-devel:rhel/python3-libnbd package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in the memory management API of QEMU during the initialization of a memory region cache. This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0.

CVSS Scores

version 3.1