CVE-2026-35579
github.com/coredns/coredns: CoreDNS: Authentication bypass allows unauthorized access to TSIG-protected functionalities
Sévérité par source
Le label propre à Trivy est CRITICAL. Critique selon NVD, Photon OS. Plus basse selon GHSA (élevée), Red Hat (élevée), Azure Linux (élevée).
Description
CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3 transport implementations incorrectly handle TSIG authentication. For gRPC and QUIC, the server checks whether the TSIG key name exists in the configuration but never calls dns.TsigVerify() to validate the HMAC. If the key name matches a configured key, the tsigStatus field remains nil and the tsig plugin treats the request as successfully authenticated regardless of the MAC value. For DoH and DoH3, the issue is more severe: the DoHWriter.TsigStatus() method unconditionally returns nil, and the server never inspects the TSIG record at all. Any request containing a TSIG record is treated as authenticated over DoH and DoH3, even if the key name is invalid and the MAC is arbitrary. An unauthenticated network attacker can exploit this to bypass TSIG-protected functionality such as AXFR/IXFR zone transfers, dynamic DNS updates, or other TSIG-gated plugin behavior. The DoH and DoH3 variants have a lower exploitation bar because the attacker does not need to know a valid TSIG key name. This issue has been fixed in version 1.14.3. As a workaround, disable gRPC, QUIC, DoH, and DoH3 listeners where TSIG authentication is required, or restrict network-level access to affected transport ports to trusted sources only.
Paquets affectés et versions corrigées
| Source | Paquet | Corrigé en |
|---|---|---|
| Photon OS 4.0 | coredns | 1.14.3-1.ph4 |
| Photon OS 5.0 | coredns | 1.11.1-16.1.ph5 |
| Azure Linux 3.0 | coredns | 0:1.11.4-16.azl3 |
| chainguard | eks-distro-1.31, eks-distro-1.32, eks-distro-1.33 et 14 autres | 1.31.43-r2 et 10 autres |
| go::GitHub Security Advisory Go | github.com/coredns/coredns | 1.14.3 |
| minimos | coredns-1.14, coredns-fips-1.14, kubernetes-dns-node-cache et 1 autres | 1.14.3-r0 et 1 autres |
| rapidfort alpine 3.20 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.21 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.22 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.23 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.24 | coredns | 1.14.7-r0 |
| wolfi | juicefs-1.3, k8s_gateway, kubernetes-dns-node-cache | 1.3.1-r14 et 2 autres |
Afficher les 33 entrées de 12 sources
| Source | Paquet | Corrigé en |
|---|---|---|
| Photon OS 4.0 | coredns | 1.14.3-1.ph4 |
| Photon OS 5.0 | coredns | 1.11.1-16.1.ph5 |
| Azure Linux 3.0 | coredns | 0:1.11.4-16.azl3 |
| chainguard | eks-distro-1.31 | 1.31.43-r2 |
| chainguard | eks-distro-1.32 | 1.32.36-r2 |
| chainguard | eks-distro-1.33 | 1.33.26-r2 |
| chainguard | eks-distro-1.34 | 1.34.17-r2 |
| chainguard | eks-distro-1.35 | 1.35.8-r2 |
| chainguard | eks-distro-1.36 | 1.36.2-r6 |
| chainguard | eks-distro-fips-1.31 | 1.31.43-r2 |
| chainguard | eks-distro-fips-1.32 | 1.32.36-r2 |
| chainguard | eks-distro-fips-1.33 | 1.33.26-r2 |
| chainguard | eks-distro-fips-1.34 | 1.34.17-r2 |
| chainguard | eks-distro-fips-1.35 | 1.35.8-r2 |
| chainguard | eks-distro-fips-1.36 | 1.36.2-r5 |
| chainguard | juicefs-1.3 | 1.3.1-r14 |
| chainguard | k8s_gateway | 1.8.0-r1 |
| chainguard | k8s_gateway-fips | 1.8.0-r1 |
| chainguard | kubernetes-dns-node-cache | 1.26.8-r3 |
| chainguard | kubernetes-dns-node-cache-fips | 1.26.8-r2 |
| go::GitHub Security Advisory Go | github.com/coredns/coredns | 1.14.3 |
| minimos | coredns-1.14 | 1.14.3-r0 |
| minimos | coredns-fips-1.14 | 1.14.3-r0 |
| minimos | kubernetes-dns-node-cache | 1.26.8-r1 |
| minimos | kubernetes-dns-node-cache-fips | 1.26.8-r1 |
| rapidfort alpine 3.20 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.21 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.22 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.23 | coredns | 1.14.7-r0 |
| rapidfort alpine 3.24 | coredns | 1.14.7-r0 |
| wolfi | juicefs-1.3 | 1.3.1-r14 |
| wolfi | k8s_gateway | 1.8.0-r1 |
| wolfi | kubernetes-dns-node-cache | 1.26.8-r3 |
Références
- https://access.redhat.com/errata/RHSA-2026:25127
- https://access.redhat.com/security/cve/CVE-2026-35579
- https://bugzilla.redhat.com/show_bug.cgi?id=2466905
- https://github.com/coredns/coredns
- https://github.com/coredns/coredns/releases/tag/v1.14.3
- https://github.com/coredns/coredns/security/advisories/GHSA-vp29-5652-4fw9
- https://nvd.nist.gov/vuln/detail/CVE-2026-35579
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35579.json