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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:sigstore_timestamp_authority:*:*:*:*:*:*:*:*", "matchCriteriaId": "7D8EA727-11A8-4D61-8E22-F87608DA7009", "versionEndExcluding": "2.0.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call to strings.Split) an optionally-provided OID (which is untrusted data) on periods. Similarly, function api.getContentType splits the Content-Type header (which is also untrusted data) on an application string. As a result, in the face of a malicious request with either an excessively long OID in the payload containing many period characters or a malformed Content-Type header, a call to api.ParseJSONRequest or api.getContentType incurs allocations of O(n) bytes (where n stands for the length of the function's argument). This vulnerability is fixed in 2.0.3."}], "id": "CVE-2025-66564", "lastModified": "2026-03-17T20:38:33.343", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2025-12-04T23:15:47.430", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/sigstore/timestamp-authority/commit/0cae34e197d685a14904e0bad135b89d13b69421"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-405"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "github.com/sigstore/timestamp-authority: Sigstore Timestamp Authority: Denial of Service via excessive OID or Content-Type header parsing", "id": "2419054", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2419054"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-405", "details": ["Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call to strings.Split) an optionally-provided OID (which is untrusted data) on periods. Similarly, function api.getContentType splits the Content-Type header (which is also untrusted data) on an application string. As a result, in the face of a malicious request with either an excessively long OID in the payload containing many period characters or a malformed Content-Type header, a call to api.ParseJSONRequest or api.getContentType incurs allocations of O(n) bytes (where n stands for the length of the function's argument). This vulnerability is fixed in 2.0.3."], "name": "CVE-2025-66564", "package_state": [{"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Under investigation", "package_name": "openshift-pipelines-client", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Under investigation", "package_name": "openshift-pipelines/pipelines-chains-controller-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Under investigation", "package_name": "openshift-pipelines/pipelines-chains-controller-rhel9", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Under investigation", "package_name": "openshift-pipelines/pipelines-cli-tkn-rhel8", "product_name": "OpenShift Pipelines"}, {"cpe": "cpe:/a:redhat:openshift_pipelines:1", "fix_state": "Under investigation", "package_name": "openshift-pipelines/pipelines-cli-tkn-rhel9", "product_name": 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"cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Under investigation", "package_name": "advanced-cluster-security/rhacs-collector-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Under investigation", "package_name": "advanced-cluster-security/rhacs-main-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Under investigation", "package_name": "advanced-cluster-security/rhacs-operator-bundle", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Under investigation", "package_name": "advanced-cluster-security/rhacs-rhel8-operator", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Under investigation", "package_name": "advanced-cluster-security/rhacs-roxctl-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Under investigation", "package_name": "advanced-cluster-security/rhacs-scanner-v4-db-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:advanced_cluster_security:4", "fix_state": "Under investigation", "package_name": "advanced-cluster-security/rhacs-scanner-v4-rhel8", "product_name": "Red Hat Advanced Cluster Security 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "openshift4/ose-aws-cluster-api-controllers-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Under investigation", "package_name": "openshift4/ose-ibmcloud-cluster-api-controllers-rhel9", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3:", "fix_state": "Under investigation", "package_name": "devspaces/udi-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/client-server-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/cosign-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/gitsign-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/policy-controller-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/rhtas-console-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:trusted_artifact_signer:1", "fix_state": "Under investigation", "package_name": "rhtas/timestamp-authority-rhel9", "product_name": "Red Hat Trusted Artifact Signer"}, {"cpe": "cpe:/a:redhat:openshift_security_profiles_operator:1", "fix_state": "Under investigation", "package_name": "compliance/openshift-security-profiles-operator-bundle", "product_name": "Security Profiles Operator"}, {"cpe": "cpe:/a:redhat:openshift_security_profiles_operator:1", "fix_state": "Under investigation", "package_name": "compliance/openshift-security-profiles-rhel8-operator", "product_name": "Security Profiles Operator"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:0", "fix_state": "Under investigation", "package_name": "zero-trust-workload-identity-manager/spiffe-spire-agent-rhel9", "product_name": "Zero Trust Workload Identity Manager - Tech Preview"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:0", "fix_state": "Under investigation", "package_name": "zero-trust-workload-identity-manager/spiffe-spire-oidc-discovery-provider-rhel9", "product_name": "Zero Trust Workload Identity Manager - Tech Preview"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:0", "fix_state": "Under investigation", "package_name": "zero-trust-workload-identity-manager/spiffe-spire-server-rhel9", "product_name": "Zero Trust Workload Identity Manager - Tech Preview"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:0", "fix_state": "Under investigation", "package_name": "zero-trust-workload-identity-manager/zero-trust-workload-identity-manager-operator-bundle", "product_name": "Zero Trust Workload Identity Manager - Tech Preview"}, {"cpe": "cpe:/a:redhat:zero_trust_workload_identity_manager:0", "fix_state": "Under investigation", "package_name": "zero-trust-workload-identity-manager/zero-trust-workload-identity-manager-rhel9", "product_name": "Zero Trust Workload Identity Manager - Tech Preview"}], "public_date": "2025-12-04T22:37:13Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-66564\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-66564\nhttps://github.com/sigstore/timestamp-authority/commit/0cae34e197d685a14904e0bad135b89d13b69421\nhttps://github.com/sigstore/timestamp-authority/security/advisories/GHSA-4qg8-fj49-pxjh"], "statement": "This vulnerability is rated Important for Red Hat products. The Sigstore Timestamp Authority, a service for issuing RFC 3161 timestamps, is prone to excessive memory allocation. This occurs when processing untrusted OID payloads with many period characters or malformed Content-Type headers. An unauthenticated attacker could exploit this flaw to trigger a denial of service in affected Red Hat products that utilize this component.", "threat_severity": "Important"}

{"created": "2025-12-05T10:52:19.608411+00:00", "updated": "2025-12-05T10:52:19.608461+00:00", "vendors": ["sigstore", "sigstore$PRODUCT$timestamp_authority"]}