CVE-2021-3716 Affecting virt:rhel/libguestfs-tools-c package, versions <1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.11% (46th percentile)

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  • Snyk IDSNYK-ALMALINUX8-VIRT-5727999
  • published28 May 2023
  • disclosed10 May 2022

Introduced: 10 May 2022

CVE-2021-3716  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 virt:rhel/libguestfs-tools-c to version 1:1.44.0-5.module_el8.6.0+2880+7d9e3703.alma or higher.
This issue was patched in ALSA-2022:1759.

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.

A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBD_OPT_STRUCTURED_REPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.

CVSS Scores

version 3.1