Loop with Unreachable Exit Condition ('Infinite Loop') Affecting virt:av/libvirt-daemon-driver-storage-iscsi package, versions <0:7.6.0-6.module+el8.5.0+13051+7ddbe958


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-4423985
  • published26 Jul 2021
  • disclosed10 Feb 2021

Introduced: 10 Feb 2021

CVE-2021-20257  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:av/libvirt-daemon-driver-storage-iscsi to version 0:7.6.0-6.module+el8.5.0+13051+7ddbe958 or higher.
This issue was patched in RHSA-2022:0081.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:av/libvirt-daemon-driver-storage-iscsi package and not the virt:av/libvirt-daemon-driver-storage-iscsi package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS Scores

version 3.1