* Neil Gierman wrote: > If a person was able to inject a modified CRL into > that CDP URL, or redirect the client machine to an alternate server for > LDAP/HTTP CRL download, and CAPI is not validating signatures on CRL's > then a person could use a revoked certificate for access to systems among > other things. You have to distinguish between CRL retrieval (which is not really critical) and using a CRL in the process of verifying an certificate chain. All parts of Microsoft's CryptoAPI use CertGetCRLFromStore with CERT_STORE_SIGNATURE_FLAG, i.e. improperly signed CRLs won't be used in the verification process. So unless you're using Microsoft's CryptoAPI at a low level and you don't know what you're doing there is no issue. Thomas Walpuski
