CVE-2022-3924: Input Validation
First published: Tue Jan 24 2023(Updated: )
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.
Credit: security-officer@isc.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/bind9.16 | <32:9.16.23-0.14.el8 | 32:9.16.23-0.14.el8 |
| redhat/bind | <32:9.16.23-11.el9 | 32:9.16.23-11.el9 |
| ISC BIND | >=9.16.12<9.16.37 | |
| ISC BIND | >=9.18.0<9.18.11 | |
| ISC BIND | >=9.19.0<9.19.9 | |
| ISC BIND | =9.16.12-s1 | |
| ISC BIND | =9.16.13-s1 | |
| ISC BIND | =9.16.14-s1 | |
| ISC BIND | =9.16.21-s1 | |
| ISC BIND | =9.16.32-s1 | |
| ISC BIND | =9.16.36-s1 |
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Reference Links
- https://kb.isc.org/docs/cve-2022-3924
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2164508
- https://access.redhat.com/errata/RHSA-2023:2261
- https://access.redhat.com/errata/RHSA-2023:2792
- https://access.redhat.com/security/cve/cve-2022-3924
- https://bugzilla.redhat.com/show_bug.cgi?id=2164039
- https://www.cve.org/CVERecord?id=CVE-2022-3924 https://nvd.nist.gov/vuln/detail/CVE-2022-3924 https://kb.isc.org/docs/cve-2022-3924
Frequently Asked Questions
What is the vulnerability ID for this flaw in Bind?
The vulnerability ID for this flaw in Bind is CVE-2022-3924.
What is the severity level of CVE-2022-3924?
CVE-2022-3924 has a severity level of 7.5 (High).
Which software is affected by CVE-2022-3924?
CVE-2022-3924 affects 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.
How can I fix CVE-2022-3924?
To fix CVE-2022-3924, update the affected BIND software to version 9.16.37 or later.
Where can I find more information about CVE-2022-3924?
You can find more information about CVE-2022-3924 in the following references: [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2164508) and [Red Hat Advisory RHSA-2023:2261](https://access.redhat.com/errata/RHSA-2023:2261).
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