Description

This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

CNA:  Internet Systems Consortium (ISC)

Base Score:  7.5 HIGH

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

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score: N/A

NVD score not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://kb.isc.org/docs/cve-2022-3924	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-617	Reachable Assertion	NIST

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Change History

1 change records found show changes

Initial Analysis by NIST 2/06/2023 11:28:47 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 686 characters. View Entire Change Record OR *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.16.12 up to (excluding) 9.16.37 *cpe:2.3:a:isc:bind:9.16.12:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.14:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.32:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.36:s1:*:*:supported_preview:*:*:* *cpe:2.
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST CWE-617
Changed	Reference Type	https://kb.isc.org/docs/cve-2022-3924 No Types Assigned	https://kb.isc.org/docs/cve-2022-3924 Vendor Advisory