{"record":{"id":"76dd83f9bbee6f98","repo":"juanfont/headscale","slug":"cannot-use-autogroup-danger-all-as-a-dst","errorCode":null,"errorMessage":"cannot use autogroup:danger-all as a dst","messagePattern":"cannot use autogroup:danger-all as a dst","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"hscontrol/policy/v2/types.go","lineNumber":139,"sourceCode":"\tErrInvalidAutoApprover         = errors.New(\"invalid auto approver format\")\n\tErrInvalidOwner                = errors.New(\"invalid owner format\")\n\tErrGroupNotDefined             = errors.New(\"group not defined in policy\")\n\tErrInvalidGroupMember          = errors.New(\"invalid group member type\")\n\tErrGroupValueNotArray          = errors.New(\"group value must be an array of users\")\n\tErrInvalidHostIP               = errors.New(\"hostname contains invalid IP address\")\n\tErrTagNotDefined               = errors.New(\"tag not found\")\n\tErrAutoApproverNotAlias        = errors.New(\"auto approver is not an alias\")\n\tErrInvalidACLAction            = errors.New(\"invalid ACL action\")\n\tErrInvalidSSHAction            = errors.New(\"invalid SSH action\")\n\tErrInvalidProtocolNumber       = errors.New(\"invalid protocol number\")\n\tErrProtocolLeadingZero         = errors.New(\"leading 0 not permitted in protocol number\")\n\tErrProtocolOutOfRange          = errors.New(\"protocol number out of range (0-255)\")\n\tErrAutogroupNotSupported       = errors.New(\"autogroup not supported in headscale\")\n\tErrAutogroupInternetSrc        = errors.New(\"autogroup:internet can only be used in ACL destinations\")\n\tErrAutogroupSelfSrc            = errors.New(\"\\\"autogroup:self\\\" not valid on the src side of a rule\")\n\tErrAutogroupNotSupportedACLSrc = errors.New(\"autogroup not supported for ACL sources\")\n\tErrAutogroupNotSupportedACLDst = errors.New(\"autogroup not supported for ACL destinations\")\n\tErrAutogroupDangerAllDst       = errors.New(\"cannot use autogroup:danger-all as a dst\")\n\tErrAutogroupNotSupportedSSHSrc = errors.New(\"autogroup not supported for SSH sources\")\n\tErrAutogroupNotSupportedSSHDst = errors.New(\"autogroup not supported for SSH destinations\")\n\tErrHostNotDefined              = errors.New(\"host not defined in policy\")\n\tErrSSHSourceAliasNotSupported  = errors.New(\"alias not supported for SSH source\")\n\tErrSSHDestAliasNotSupported    = errors.New(\"alias not supported for SSH destination\")\n\tErrUnknownField                = errors.New(\"unknown field\")\n\tErrProtocolNoSpecificPorts     = errors.New(\"protocol does not support specific ports\")\n\tErrTestEmptyAssertions         = errors.New(\"test entry must have at least one of \\\"accept\\\" or \\\"deny\\\"\")\n\tErrTestProtocolNotAllowed      = errors.New(\"test protocol must be tcp, udp, sctp, or empty\")\n\tErrTestDestinationMultiPort    = errors.New(\"test destination port must be a single port\")\n\tErrTestDestinationCIDR         = errors.New(\"test destination must be a single host, not a CIDR range\")\n\tErrAutogroupInternetTestDst    = errors.New(\"autogroup:internet not valid as a test destination\")\n\tErrSSHTestEmptySrc             = errors.New(\"SSH tests entry must have a non-empty src\")\n\tErrSSHTestEmptyDst             = errors.New(\"SSH tests entry must have at least one dst\")\n\tErrSSHTestDstUnknownTag        = errors.New(\"SSH tests dst contains unknown tag\")\n\tErrSSHTestDstDisallowedElement = errors.New(\"SSH tests dst contains disallowed element\")\n)\n","sourceCodeStart":121,"sourceCodeEnd":157,"githubUrl":"https://github.com/juanfont/headscale/blob/565fd254d06c4c7f9a8cad1714a43445c79ba420/hscontrol/policy/v2/types.go#L121-L157","documentation":"Returned by validateAutogroupForDst (hscontrol/policy/v2/types.go:2058) when autogroup:danger-all appears on the destination side of an ACL rule. danger-all matches every possible source (a deliberate footgun allowed only on src, mirroring Tailscale); allowing it as a dst would grant the entire universe access to internal services, so it is hard-rejected.","triggerScenarios":"Policy with \"acls\": [{\"action\": \"accept\", \"src\": [\"autogroup:member\"], \"dst\": [\"autogroup:danger-all:*\"]}] or any dst alias spelling of autogroup:danger-all.","commonSituations":"Attempt to write 'everyone can reach everything' — sometimes done in lab tailnets. Also from templating that injects danger-all into both sides of generated rules.","solutions":["Remove autogroup:danger-all from dst; if you truly want allow-all in a lab, use \"*:*\" as the dst with an explicit src","Keep autogroup:danger-all (if at all) only on the src side","Prefer explicit groups/tags to avoid unintended exposure"],"exampleFix":"// before\n{\"action\": \"accept\", \"src\": [\"autogroup:member\"], \"dst\": [\"autogroup:danger-all:*\"]}\n\n// after (lab-only allow-all)\n{\"action\": \"accept\", \"src\": [\"autogroup:member\"], \"dst\": [\"*:*\"]}","handlingStrategy":"validation","validationCode":"for _, d := range acl.Dst {\n\tif strings.HasPrefix(d.Alias, \"autogroup:danger-all\") {\n\t\treturn errors.New(\"autogroup:danger-all cannot be a dst\")\n\t}\n}","typeGuard":"func isAutogroupDangerAllDst(err error) bool {\n\treturn errors.Is(err, policy.ErrAutogroupDangerAllDst)\n}","tryCatchPattern":"if err := p.Validate(); err != nil {\n\tif errors.Is(err, policy.ErrAutogroupDangerAllDst) {\n\t\treturn fmt.Errorf(\"danger-all is src-only; use *:port or explicit targets as dst: %w\", err)\n\t}\n\treturn err\n}","preventionTips":["Reserve autogroup:danger-all (if ever) for src-only lab rules","Review any rule containing danger-all in change management — it is a security footgun","Prefer explicit groups/tags over catch-alls in production policies"],"tags":["policy","autogroup","acl","security","validation"],"backgroundTag":null,"analyzedSha":"565fd254d06c4c7f9a8cad1714a43445c79ba420","analyzedAt":"2026-08-15T13:12:30.133Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}