Loop with Unreachable Exit Condition ('Infinite Loop') Affecting virt:rhel/libguestfs-tools-c package, versions <1:1.40.2-28.module_el8.5.0+2608+72063365.alma


Severity

Recommended
low

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-ALMALINUX8-VIRT-5641697
  • published28 May 2023
  • disclosed21 Dec 2021

Introduced: 21 Dec 2021

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

How to fix?

Upgrade AlmaLinux:8 virt:rhel/libguestfs-tools-c to version 1:1.40.2-28.module_el8.5.0+2608+72063365.alma or higher.
This issue was patched in ALSA-2021:5238.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/libguestfs-tools-c package and not the virt:rhel/libguestfs-tools-c package as distributed by AlmaLinux. See How to fix? for AlmaLinux: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