Websites and tools that have sprung up to check whether servers are
vulnerable to OpenSSL's mega-vulnerability Heartbleed have thrown up
anomalies in computer crime law on both sides of the Atlantic.
Both
the US Computer Fraud and Abuse Act and its UK equivalent the Computer
Misuse Act make it an offence to test the security of third-party
websites without permission.
Testing to see what version of OpenSSL a site is running, and whether it is also supports the vulnerable Heartbeat protocol,
would be legal. But doing anything more active – without permission
from website owners – would take security researchers onto the wrong
side of the law.
Chris Wysopal, co-founder of Veracode and former
member of the celebrated Boston-based hacking crew L0pht, was among the
first security researchers to raise the issue:
"I would say it would certainly contravene the Computer Misuse Act in the UK," said
computer security researcher David Litchfield, a celebrated expert in
database security issues. "This is no different than say testing to see
if a site is vulnerable to SQL injection. It's not legal without
permission."
Unauthorised security probing is illegal under section 3 of the UK's Computer Misuse Act 1990, whatever the intent, as case law has established.
IT lawyer Dai Davis, a solicitor at Percy Crow Davis & Co , told El Reg
that actively scanning for the Heartbleed vulnerability would violate
the UK computer crime laws, even though this "violation" is unlikely to
be enforced.
"Under UK law you could argue running scans is just about criminal," Davis told El Reg. "It's not in the spirit of the law but the Computer Misuse Act is badly written."
Some
security researchers argued that there ought to be an exemption to
these laws if the activity is "helpful", while others say that this
aspect of computer crime law is not being enforced or is, in any case,
being ignored.
"It’s not legal, but vast numbers of otherwise ethical security professionals are testing every site on the internet," tweeted Martin McKeay, a security researcher at Akamai.
Heartbleed is a pretty bad bug
in widely used OpenSSL that creates a means for attackers to lift
passwords, crypto-keys and other sensitive data from the memory of
secure server software, 64KB at a time.
The mega-vulnerability was
patched earlier this week, and software should be updated to use the
new version, 1.0.1g. But to fully clean up the problem, admins of
at-risk servers should generate new public-private key pairs, destroy
their session cookies, and update their SSL certificates before telling users to change every potentially compromised password on the vulnerable systems.
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