CVE-2021-3716

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 03-03-2022 12:15

Last modified: - 09-03-2022 08:34

Total changes: - 5

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

High

Attack complexity

Network

Attack vector

Low

Availability

None

Confidentiality

None

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

3.1

Base score

1.6

1.4

Exploitability score

Impact score

Verification logic

vendor=nbdkit_project AND product=nbdkit AND versionStartIncluding=1.11.8 AND versionEndExcluding=1.24.6

vendor=nbdkit_project AND product=nbdkit AND versionStartIncluding=1.25.1 AND versionEndExcluding=1.26.5

vendor=nbdkit_project AND product=nbdkit AND versionStartIncluding=1.27.1 AND versionEndExcluding=1.27.6

vendor=Red Hat Enterprise Linux AND product=enterprise_linux AND version=8.0 AND software_edition=-

vendor=Red Hat Enterprise Linux AND product=enterprise_linux AND version=8.0 AND software_edition=advanced_virtualization

Reference

Keywords

CVE-2021-3716

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-3716

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures