Loop with Unreachable Exit Condition ('Infinite Loop') Affecting virt:rhel/sgabios package, versions <1:0.20170427git-3.module+el8.1.0+4066+0f1aadab


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-4077428
  • published26 Jul 2021
  • disclosed24 Feb 2021

Introduced: 24 Feb 2021

CVE-2021-3416  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/sgabios to version 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab or higher.
This issue was patched in RHSA-2021:3061.

NVD Description

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

A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.

CVSS Scores

version 3.1