Description
Processing of repeated responses to the same query, where both responses contain ECS pseudo-options, but where the first is broken in some way, can cause BIND to exit with an assertion failure.
'Broken' in this context is anything that would cause the resolver to reject the query response, such as a mismatch between query and answer name.
This issue affects BIND 9 versions 9.11.4-S1 through 9.11.37-S1 and 9.16.8-S1 through 9.16.36-S1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND 9 | 9.11.4-S1 – ≤ 9.11.37-S1, 9.16.8-S1 – ≤ 9.16.36-S1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | bind +16 | 32:9.16.38-1.amzn2023 | ALAS2023-2023-161 |
Advisories 2
- WID-SEC-2023-0207 Internet Systems Consortium BIND: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Aug 6, 2026
- ALAS2023-2023-161 Important: bind security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 19, 2023
References
- CVE-2022-3488 vendor-advisory