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.

CVSS v3.0 3.1 LOW
CVSS v2.0 3.5 LOW

3.1^/10

CVSS v3.0 : LOW

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

3.5^/10

CVSS v2.0 : LOW

Vector : AV:N/AC:M/Au:S/C:N/I:N/A:P

Exploitability : 6.8 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

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 Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nbdkit_project:nbdkit::::::::
	cpe:2.3:a:nbdkit_project:nbdkit::::::::
	cpe:2.3:a:nbdkit_project:nbdkit::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::
	cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::

Information

Published : 2022-03-02 15:15

Updated : 2022-03-09 11:34

NVD link : CVE-2021-3716

Mitre link : CVE-2021-3716

JSON object : View

CWE

CWE-924

Improper Enforcement of Message Integrity During Transmission in a Communication Channel

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Products Affected

nbdkit_project

nbdkit

redhat

enterprise_linux

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