CVE Vulnerability

CVE-2021-3716

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.

3.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 6.8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

3.1 /10

CVSS v3.0 : LOW

V3 Legend

Vector :

Exploitability : 1.6 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://www.openwall.com/lists/oss-security/2021/08/18/2 Mailing List Third Party Advisory
https://gitlab.com/nbdkit/nbdkit/-/commit/09a13dafb7bb3a38ab52eb5501cba786365ba7fd Patch Third Party Advisory
https://gitlab.com/nbdkit/nbdkit/-/commit/6c5faac6a37077cf2366388a80862bb00616d0d8 Patch Third Party Advisory
https://listman.redhat.com/archives/libguestfs/2021-August/msg00083.html Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=1994695 Issue Tracking Patch
Configurations

Configuration 1

cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*
cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*
cpe:2.3:a:nbdkit_project:nbdkit:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:*
Information

Published : 2022-03-02 11:15

Updated : 2022-03-09 07:34

NVD link : CVE-2021-3716

Mitre link : CVE-2021-3716

Products Affected
No products.
CWE
CWE-924

Improper Enforcement of Message Integrity During Transmission in a Communication Channel