CVE-2023-28452 CoreDNS vulnerable to TuDoor Attacks

What is CVE-2023-28452?

CVE-2023-28452 is a high-severity denial of service vulnerability in n/a, published on 18 Sep 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in CoreDNS through 1.10.1. There is a vulnerability in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing denial of service for normal resolution. In an exploit, the attacker could just forge a response targeting the source port of a vulnerable resolver without the need to guess the correct TXID.

Weakness: CWE-290

Which versions are affected by CVE-2023-28452?

3 open source packages ship an affected version, including github.com/coredns/coredns. It affects 1 product.

Products include Coredns.io Coredns.

How do I fix CVE-2023-28452?

Upgrade github.com/coredns/coredns to 1.11.0 or later.

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-2023-28452 being exploited?

There is no known exploitation of CVE-2023-28452 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2026-32934 CoreDNS DNS-over-QUIC unbounded goroutine growth leads to denial of service High 8.7
• CVE-2026-32936 CoreDNS DoH GET path missing size validation causes CPU and memory amplification High 8.7
• CVE-2026-33190 CoreDNS TSIG authentication bypass on encrypted DNS transports High 8.7
• CVE-2026-33489 CoreDNS transfer plugin subzone ACL bypass via lexicographic zone comparison High 8.2
• CVE-2026-35579 CoreDNS TSIG authentication bypass on gRPC, QUIC, DoH, and DoH3 transports High 8.2

Sources

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

Also known as CLEANSTART-2026-XJ00133, ECHO-7df6-6e5e-506b, GHSA-hfmw-7g3m-gj6q, GO-2024-3130.