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Vulnerability Management

7/29/2014
05:07 PM
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Scan Shows Possible Heartbleed Fix Failures

Study indicates many Global 2000 firms patched, but failed to replace digital certificates.

Of more than 1,600 Global 2000 firms, only 3% of their public-facing servers have been fully and properly locked down from the Heartbleed vulnerability that was first revealed nearly three months ago, new data shows.

While fewer than 1% of the external-facing servers at these enterprises remain fully vulnerable to Heartbleed, some 97% are only partially remediated from the threat, mostly because they failed to replace the private key, or revoke the old digital certificate. By not replacing the private key, an attacker could decrypt SSL traffic from the host, and by failing to revoke the old cert, an attacker could use it in phishing attacks, according to the July 2014 status report by Venafi.

"Heartbleed has been known to the world for 11 weeks now. Yet we still see evidence of thousands of systems susceptible to Heartbleed that have not even been patched yet," says Kevin Bocek, vice president of security strategy and threat intelligence at Venafi, in an email interview. "We believe this is partly due to a 'patch-and-move-on' mentality amongst IT professionals, meaning that once the patch is addressed, they believe the security hole is plugged. This approach is something that must be changed because as attacks continue to evolve and become more sophisticated, remediation becomes more extensive requiring multiple steps aside from just patching the vulnerable system."

But Robert Graham, CEO of Errata Security, says he's skeptical of the data in the report, and that it distorts the issue. He says his own scans show that 90% of externally facing sites don't use OpenSSL in the first place, so they had no reason to revoke and reissue keys.

He says the big issue is about organizations not revoking the at-risk digital certificates. "The paper doesn't mention the exact breakdown, but it's likely that the primary issue is lack of revocation of existing certificates. That is indeed something that many affected organizations haven't done, but should do," he says.

Dan Kaminsky, chief scientist at WhiteOps, says corporations have better processes in place for patching their internal servers than for working with third parties such as certificate authorities. "With an absence of evidence that keys were actually compromised, it wouldn't be surprising that the internal code was updated while the external dependency -- the new certs -- was left unaddressed," Kaminsky says.

He says it's unclear in the report whether the certificates are CA-originated ones or not. "Self-signed certs don't really offer much security at all, Heartbleed or not," he notes.

[Heartbleed wasn't the first security hole discovered in SSL deployments, and it won't be the last. Read SSL After The Heartbleed.]

Meanwhile, the risk of bad guys pilfering private keys was fairly low, says Ivan Ristic, director of Qualys's SSL Labs. That may also explain why organizations appear not to be taking the certificate issue as seriously, he notes.

The full report is available here (PDF) for download.

Kelly Jackson Higgins is the Executive Editor of Dark Reading. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio

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securityaffairs
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securityaffairs,
User Rank: Ninja
7/31/2014 | 5:21:20 PM
Re: patch only?
I have a few doubts related to the absolute data proposed. As said by Robert Grahamprobably the number of organizations that doesn't use OpenSSL in very high. 

This statement puzzles me about the quality of the "population" analyzed.
"only 3% of Their public-facing servers not have been fully and properly locked down from the Heartbleed vulnerability"
Whoopty
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Whoopty,
User Rank: Ninja
7/30/2014 | 10:59:45 AM
Project Zero
I wonder if major bugs like this that affect thousands of sites will become rarer in the future, thanks to efforts like Google's Project Zero security team. They've hired on the likes of Geohotz and several other amazing hackers, so it seems like they'll be able to really shore up the digital defenses of a lot of web properties. 
Kelly Jackson Higgins
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Kelly Jackson Higgins,
User Rank: Strategist
7/30/2014 | 9:59:51 AM
Re: patch only?
Thank you for sharing that, Ryan. I'm also curious if any org has a good reason not to patch and reissue the cert.
RyanSepe
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RyanSepe,
User Rank: Ninja
7/30/2014 | 9:54:57 AM
Re: patch only?
My institution patched for Heartbleed and cycled the certs. Otherwise you won't be able to confidently say that your systems aren't exploited. The vulnerability may have allowed for forged certs to be applied and if you only patched you would not be able to detect the further exploits of the system. I would be interested to hear the validation for institutions that only patched as well. Might provide some perspective we couldn't think of.
Kelly Jackson Higgins
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Kelly Jackson Higgins,
User Rank: Strategist
7/29/2014 | 5:19:16 PM
patch only?
Any of our readers willing to share whether they've only patched for Heartbleed, but not revoked their digital certs? We'd love to hear your perspective on this. 
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