Feeds

Did Google certificate forgers hit hundreds more sites?

Google Chrome blacklists 247 credentials

The Essential Guide to IT Transformation

The hack attack that minted a fraudulent authentication credential for Google.com may have affected hundreds of other websites, a review of source code for Google's Chromium browser suggests.

A side-by-side review comparing code contained in an upcoming version of Chrome increased the number of secure sockets layer certificates hardcoded in the browser's blacklist by 247. A comment accompanying the additions said: “Bad DigiNotar leaf certificates for non-Google sites.”

As previously reported, Microsoft, Google, Firefox, and other software makers announced updates on Monday to prevent their products from trusting SSL certificates issued by DigiNotar. They took the unprecedented move following Monday's discovery that the Netherlands-based certificate authority had issued a bogus certificate for Gmail, Google Docs, and other Google services that was being used to target people in Iran.

In a press release that raised new concerns, DigiNotar said on Tuesday that a July 19 attack on its certificate authority system resulted in forgeries being issued for “a number of domains” including Google's, but declined to specify the names or give a precise number. In a later interview with IDG News, a DigiNotar spokesman put the figure at “several dozen.”

The vacuum of information from DigiNotar has left researchers scrambling to figure out exactly how many sites might be affected. Exhibit A is the Chrome differential showing the number of “static const unsigned kNumSerials” equalling 257, compared to 10 in the previous version. The constant variable refers to the number of serial numbers enumerated in a list of blacklisted certificates.

Exhibit B is this list, compiled from DigiNotar's certificate revocation list. It shows that a little more than 100 certificates have been cancelled by the certificate authority since June.

It's impossible to say if all of Monday's changes to Chrome's “static const unsigned kNumSerials” involved certificates for separate web addresses. A Google spokesman didn't respond to an email asking for an explanation of the changes.

But the increase in serial numbers, combined with the comments “seem pretty indicative” that Chrome has purged hundreds of non-Google certificates issued by DigiNotar, said Andrew Storms, director of security operations at nCircle. ®

Build a business case: developing custom apps

More from The Register

next story
14 antivirus apps found to have security problems
Vendors just don't care, says researcher, after finding basic boo-boos in security software
'Things' on the Internet-of-things have 25 vulnerabilities apiece
Leaking sprinklers, overheated thermostats and picked locks all online
iWallet: No BONKING PLEASE, we're Apple
BLE-ding iPhones, not NFC bonkers, will drive trend - marketeers
Only '3% of web servers in top corps' fully fixed after Heartbleed snafu
Just slapping a patched OpenSSL on a machine ain't going to cut it, we're told
Multipath TCP speeds up the internet so much that security breaks
Black Hat research says proposed protocol will bork network probes, flummox firewalls
How long is too long to wait for a security fix?
Synology finally patches OpenSSL bugs in Trevor's NAS
Israel's Iron Dome missile tech stolen by Chinese hackers
Corporate raiders Comment Crew fingered for attacks
Tor attack nodes RIPPED MASKS off users for 6 MONTHS
Traffic confirmation attack bared users' privates - but to whom?
Roll out the welcome mat to hackers and crackers
Security chap pens guide to bug bounty programs that won't fail like Yahoo!'s
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.
Maximize storage efficiency across the enterprise
The HP StoreOnce backup solution offers highly flexible, centrally managed, and highly efficient data protection for any enterprise.