![]() ![]() Now if revocation is unavailable due of any reason, you will see similar screen: Here is a registry setting for Internet Explorer 7+: I'm not aware about similar feature in other web browsers. And if revocation checking fails, web browser displays a warning message. To address this issue Internet Explorer 7 has introduced a setting that enables strict revocation checking. By default the most popular web browsers ignores "revocation offline" errors and we can be forwarded to rogue web page with rogue certificate and put some sensitive data. What about if CA has issued a fraudulent certificate, but attacker has tampered or spoofed DNS? In this case even certificate is revoked by it's authority, but we cannot determine certificate revocation status (due of spoofed DNS). Ok, our subject is slightly different than Comodo's compromise, but is related. #CERTIFICATE ERRORS INTERNET EXPLORER 7 UPDATE#Microsoft issued update to move these certificates to Untrusted Certificates store. Looks good, but what about security? I understand that big and rich vendors can bypass CA's security measures (like requester verification), but this may cause issues like this. In this case each certificate was issued for 3 years. #CERTIFICATE ERRORS INTERNET EXPLORER 7 INSTALL#This problem typically occurs after you install Internet Explorer 7. When you start Windows Internet Explorer 7, your home page does not open. Commercial CAs request $300+ for each such certificate for a one year. Home page does not open in Internet Explorer 7. These criteria require extensive verification of the requesting entity's identity by the certificate authority (CA) before a certificate is issued (grabbed from Wikipedia). ![]() What exactly means extended validation certificate? In theory these are certificates issued according to a specific set of identity verification criteria. And not usual SSL certificates, but Extended Validation (EV) certificates! If VeriSign issued only two fraudulent certificates, Comodo - 9!!!!1111oneone. But about 2 weeks ago Comodo CAs was compromised ( ). This is very strange for a company who sell digital certificates starting with $100+ and cannot perform requestor identification as documented in their CPSs. In 31 January 2001 (more than 10 years ago) VeriSign issued two fraudulent certificates to Microsoft on behalf of unknown men. Enter the Certificate details and 'Generate'. Select 'Generate a new Certificate', Next. Select the Web server tab, then 'X.509 Certificate' link. /rebates/&252fcertificate-errors-in-internet-explorer-help-windows-7. Even highly trusted commercial certification authorities issue fraudulent certificates to malicious users. B) For expired/soon-to-expire certificates - create a new certificate: Login to ITA/OMSA 1. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |