Feeds

Did Google certificate forgers hit hundreds more sites?

Google Chrome blacklists 247 credentials

Internet Security Threat Report 2014

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. ®

Internet Security Threat Report 2014

More from The Register

next story
George Clooney, WikiLeaks' lawyer wife hand out burner phones to wedding guests
Day 4: 'News'-papers STILL rammed with Clooney nuptials
Shellshock: 'Larger scale attack' on its way, warn securo-bods
Not just web servers under threat - though TENS of THOUSANDS have been hit
Apple's new iPhone 6 vulnerable to last year's TouchID fingerprint hack
But unsophisticated thieves need not attempt this trick
PEAK IPV4? Global IPv6 traffic is growing, DDoS dying, says Akamai
First time the cache network has seen drop in use of 32-bit-wide IP addresses
Oracle SHELLSHOCKER - data titan lists unpatchables
Database kingpin lists 32 products that can't be patched (yet) as GNU fixes second vuln
Researchers tell black hats: 'YOU'RE SOOO PREDICTABLE'
Want to register that domain? We're way ahead of you.
Stunned by Shellshock Bash bug? Patch all you can – or be punished
UK data watchdog rolls up its sleeves, polishes truncheon
prev story

Whitepapers

Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
The next step in data security
With recent increased privacy concerns and computers becoming more powerful, the chance of hackers being able to crack smaller-sized RSA keys increases.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.