{"record":{"id":"6aa59d54aeb84871","repo":"oven-sh/bun","slug":"crl-signature-failure","errorCode":null,"errorMessage":"CRL_SIGNATURE_FAILURE","messagePattern":"CRL_SIGNATURE_FAILURE","errorType":"error_code","errorClass":"CertError","httpStatus":null,"severity":"error","filePath":"src/http/error.rs","lineNumber":137,"sourceCode":"\n#[allow(non_camel_case_types)]\n#[derive(Debug, Clone, Copy, PartialEq, Eq, thiserror::Error, strum::IntoStaticStr)]\npub enum CertError {\n    #[error(\"OK\")]\n    OK,\n    #[error(\"UNABLE_TO_GET_ISSUER_CERT\")]\n    UNABLE_TO_GET_ISSUER_CERT,\n    #[error(\"UNABLE_TO_GET_CRL\")]\n    UNABLE_TO_GET_CRL,\n    #[error(\"UNABLE_TO_DECRYPT_CERT_SIGNATURE\")]\n    UNABLE_TO_DECRYPT_CERT_SIGNATURE,\n    #[error(\"UNABLE_TO_DECRYPT_CRL_SIGNATURE\")]\n    UNABLE_TO_DECRYPT_CRL_SIGNATURE,\n    #[error(\"UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY\")]\n    UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY,\n    #[error(\"CERT_SIGNATURE_FAILURE\")]\n    CERT_SIGNATURE_FAILURE,\n    #[error(\"CRL_SIGNATURE_FAILURE\")]\n    CRL_SIGNATURE_FAILURE,\n    #[error(\"CERT_NOT_YET_VALID\")]\n    CERT_NOT_YET_VALID,\n    #[error(\"CERT_HAS_EXPIRED\")]\n    CERT_HAS_EXPIRED,\n    #[error(\"CRL_NOT_YET_VALID\")]\n    CRL_NOT_YET_VALID,\n    #[error(\"CRL_HAS_EXPIRED\")]\n    CRL_HAS_EXPIRED,\n    #[error(\"ERROR_IN_CERT_NOT_BEFORE_FIELD\")]\n    ERROR_IN_CERT_NOT_BEFORE_FIELD,\n    #[error(\"ERROR_IN_CERT_NOT_AFTER_FIELD\")]\n    ERROR_IN_CERT_NOT_AFTER_FIELD,\n    #[error(\"ERROR_IN_CRL_LAST_UPDATE_FIELD\")]\n    ERROR_IN_CRL_LAST_UPDATE_FIELD,\n    #[error(\"ERROR_IN_CRL_NEXT_UPDATE_FIELD\")]\n    ERROR_IN_CRL_NEXT_UPDATE_FIELD,\n    #[error(\"OUT_OF_MEM\")]","sourceCodeStart":119,"sourceCodeEnd":155,"githubUrl":"https://github.com/oven-sh/bun/blob/8c5296ac459e8252d3cd702f3fbcbb0c249d95d5/src/http/error.rs#L119-L155","documentation":"X509 verify result 8 (X509_V_ERR_CRL_SIGNATURE_FAILURE): the CRL's signature is invalid — the CRL fails integrity verification against its issuing CA. Mapped via get_cert_error_from_no (src/http/lib.rs:1527) to CertError::CRL_SIGNATURE_FAILURE, message \"CRL signature failure\" (FetchTasklet.rs:1394).","triggerScenarios":"A TLS handshake with CRL checking enabled where the retrieved CRL fails signature validation (tampered, truncated, or signed by a different CA key after rotation).","commonSituations":"Post-rotation PKIs still serving old CRLs, misconfigured CRL distribution servers, or firewalls mangling downloads.","solutions":["Re-publish a freshly signed CRL from the active CA key","Validate the CRL out of band: openssl crl -in crl.pem -CAfile ca.pem -noout -verify","Disable CRL checking for the affected host or move to OCSP","If the CRL is only stale, remove the strict-revocation requirement until the CA fixes distribution"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":"function isCertErrorCode(e: unknown, code = \"CRL_SIGNATURE_FAILURE\"): e is Error & { code: string } {\n  return e instanceof Error && (e as any).code === code;\n}","tryCatchPattern":"try {\n  await fetch(url);\n} catch (e) {\n  if (isCertErrorCode(e, \"CRL_SIGNATURE_FAILURE\")) {\n    throw new Error(\"Revocation data (CRL) failed integrity check — possible PKI compromise or misconfiguration\");\n  }\n  throw e;\n}","preventionTips":["Automate CRL signing on a schedule so CRLs are never stale or mismatched","Monitor CRL distribution endpoints like production dependencies","Prefer OCSP/stapling over CRLs where possible"],"tags":["tls","certificates","crl","revocation","fetch"],"backgroundTag":null,"analyzedSha":"8c5296ac459e8252d3cd702f3fbcbb0c249d95d5","analyzedAt":"2026-08-16T08:01:58.794Z","schemaVersion":2},"datasetVersion":"2026-08-16T08:17:34.114Z"}