CVE-2023-5679 Enabling both DNS64 and serve-stale may cause an assertion failure during recursive resolution

What is CVE-2023-5679?

CVE-2023-5679 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 13 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A bad interaction between DNS64 and serve-stale may cause `named` to crash with an assertion failure during recursive resolution, when both of these features are enabled. This issue affects BIND 9 versions 9.16.12 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.12-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

Weakness: CWE-617

Which versions are affected by CVE-2023-5679?

It affects 3 products.

Products include Fedoraproject Fedora, Isc Bind, Netapp Active Iq Unified Manager.

How do I fix CVE-2023-5679?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-5679 being exploited?

There is no known exploitation of CVE-2023-5679 in the wild and no public exploit code.

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• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2023-5679, AZL-34351, AZL-34564, BELL-CVE-2023-5679, DEBIAN-CVE-2023-5679, GHSA-v5qp-mx94-j49v and 1 more.