The ToASCII and ToUnicode functions incorrectly accept Punycode-encoded labels that decode to an ASCII-only label. For example, ToUnicode("xn--example-.com") incorrectly returns the name "example.com" rather than an error. This behavior can lead to privilege escalation in programs using the idna package. For example, a program which performs privilege checks on the ASCII hostname may reject "example.com" but permit "xn--example-.com". If that program subsequently converts the ASCII hostname to Unicode, it will inadvertently permits access to the Unicode name "example.com".
CVSS Details
- CVSS 3.1 Base Score: 9.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade grafana-pcpUpgrade grafanaUpgrade delveUpgrade golang-raceUpgrade grafana-selinuxUpgrade git-lfsUpgrade golang-srcUpgrade opentelemetry-collectorUpgrade golangUpgrade golang-docsUpgrade golang-testsUpgrade golang-binUpgrade golang-miscUpgrade go-toolset | Jun 30, 2026 | Jun 29, 2026 |
| Alpine Linux | — | Upgrade go | Sep 7, 2026 | May 22, 2026 |
| Amazon Linux Ami 2 | — | Upgrade containerd-stressUpgrade runfinch-finchUpgrade nerdctlUpgrade ecs-initUpgrade dockerUpgrade nerdctl-debuginfoUpgrade containerd-debuginfoUpgrade docker-debuginfoUpgrade soci-snapshotterUpgrade containerd | Jun 16, 2026 | Jun 16, 2026 |
| Amazon_linux_2023 | — | Upgrade docker-debuginfoUpgrade credentials-fetcherUpgrade docker-debugsourceUpgrade ecs-initUpgrade runfinch-finchUpgrade nerdctlUpgrade dockerUpgrade containerd-debuginfoUpgrade soci-snapshotterUpgrade containerd-stressUpgrade containerd-stress-debuginfoUpgrade containerdUpgrade containerd-debugsource | Jun 15, 2026 | May 22, 2026 |
| Redhat Openshift | — | Upgrade microshiftUpgrade rhcosUpgrade ose-azure-acr-image-credential-providerUpgrade ose-crio-credential-providerUpgrade openshift-clients | Aug 10, 2026 | May 22, 2026 |
| Redhat_linux | — | Upgrade golangUpgrade go-fdo-server-debuginfoUpgrade rhc-worker-scriptUpgrade golang-miscUpgrade golang-raceUpgrade ignition-debugsourceUpgrade ignition-debuginfoUpgrade golang-srcUpgrade flightctl-cliUpgrade ignition-edgeUpgrade yggdrasil-examples-debuginfoNo solution existsUpgrade grafana-pcp-debuginfoUpgrade osbuild-composer-coreUpgrade image-builder-debuginfoUpgrade grafana-debuginfoUpgrade delve-debugsourceUpgrade image-builder-debugsourceUpgrade flightctl-selinuxUpgrade osbuild-composer-core-debuginfoUpgrade rhc-debugsourceUpgrade go-fdo-server-manufacturerUpgrade delve-debuginfoUpgrade yggdrasil-debuginfoUpgrade grafana-pcp-debugsourceUpgrade git-lfs-debugsourceUpgrade golang-testsUpgrade go-fdo-server-debugsourceUpgrade ignitionUpgrade git-lfs-debuginfoUpgrade grafana-selinuxUpgrade image-builderUpgrade grafana-pcpUpgrade go-fdo-server-ownerUpgrade osbuild-composer-debugsourceUpgrade rhc-debuginfoUpgrade rhc-develUpgrade yggdrasil-develUpgrade delveUpgrade osbuild-composer-dnf-jsonUpgrade golang-docsUpgrade yggdrasil-debugsourceUpgrade grafana-debugsourceUpgrade ignition-grubUpgrade git-lfsUpgrade osbuild-composerUpgrade golang-binUpgrade go-toolsetUpgrade opentelemetry-collectorUpgrade osbuild-composer-debuginfoUpgrade grafanaUpgrade flightctl-servicesUpgrade flightctl-observabilityUpgrade osbuild-composer-workerUpgrade ignition-validateUpgrade osbuild-composer-tests-debuginfoUpgrade rhcUpgrade ignition-validate-debuginfoUpgrade yggdrasilUpgrade osbuild-composer-worker-debuginfoUpgrade go-fdo-server-rendezvousUpgrade flightctl-agentUpgrade go-fdo-server | Jul 1, 2026 | May 22, 2026 |
| Rocky_linux | — | Upgrade grafana-debuginfoUpgrade grafana-debugsourceUpgrade grafana-pcp-debugsourceUpgrade osbuild-composer-workerUpgrade delve-debugsourceUpgrade yggdrasil-debuginfoUpgrade golang-binUpgrade grafana-pcp-debuginfoUpgrade osbuild-composer-debuginfoUpgrade yggdrasil-debugsourceUpgrade opentelemetry-collectorUpgrade image-builder-debugsourceUpgrade yggdrasil-develUpgrade golang-raceUpgrade delveUpgrade osbuild-composerUpgrade osbuild-composer-coreUpgrade git-lfs-debuginfoUpgrade go-toolsetUpgrade git-lfs-debugsourceUpgrade delve-debuginfoUpgrade image-builderUpgrade osbuild-composer-core-debuginfoUpgrade yggdrasilUpgrade grafanaUpgrade image-builder-debuginfoUpgrade golangUpgrade grafana-pcpUpgrade git-lfsUpgrade osbuild-composer-debugsourceUpgrade osbuild-composer-worker-debuginfoUpgrade grafana-selinux | Jul 3, 2026 | Jul 1, 2026 |
| Ubuntu | — | Upgrade golang-go.net-dev (Ubuntu Pro)Upgrade golang-golang-x-net-dev (Ubuntu Pro) | Jun 16, 2026 | Jun 9, 2026 |
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