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.
Published 2022-03-02 23:15:09
Updated 2023-07-07 19:27:45
Source Red Hat, Inc.
View at NVD,   CVE.org

Products affected by CVE-2021-3716

Exploit prediction scoring system (EPSS) score for CVE-2021-3716

0.11%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 45 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-3716

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.5
LOW AV:N/AC:M/Au:S/C:N/I:N/A:P
6.8
2.9
NIST
3.1
LOW CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
1.6
1.4
NIST

CWE ids for CVE-2021-3716

References for CVE-2021-3716

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