Feeds

Linux users at risk as ANOTHER critical GnuTLS bug found

Patch! Patch! Patch!

  • alert
  • submit to reddit

The Essential Guide to IT Transformation

The GNUtls woes continue, with another critical flaw discovered and patched after researchers worked out malicious servers could hijack users of the cryptographic library.

Red Hat engineer Nikos Mavrogiannopoulos, who issued a patch for the flaw (CVE-2014-3466) Saturday, shortly after it was reported 28 May by Codenomicon researcher Joonas Kuorilehto.

Users of other affected software will have to sit tight until their developers incorporate the fix. Until then, they'll remain open to malware attacks.

The vulnerability put GnuTLS back in the spotlight three months after Mavrogiannopoulos discovered the dangerous goto cleanup bug affecting the platform that allowed hackers to self-sign certificates which would be gobbled up by targeted sites.

That flaw affected more than 350 Linux software packages on distributions including Ubuntu, Debian and Red Hat which depended on GnuTLS libraries for secure sockets layer and transport layer security.

The new bug was described on the Red Hat bugtracker as a flaw in the way GnuTLS parsed session ids from Server Hello packets of the TLS/SSL handshake.

"A malicious server could use this flaw to send an excessively long session id value and trigger a buffer overflow in a connecting TLS/SSL client using GnuTLS, causing it to crash or, possibly, execute arbitrary code," the description read.

"The flaw is in read_server_hello() / _gnutls_read_server_hello(), where session_id_len is checked to not exceed incoming packet size, but not checked to ensure it does not exceed maximum session id length.

A deeper analysis including proof of concept was published on the Radare.Today blog.

Users should update the latest GnuTLS versions (3.1.25, 3.2.15 or 3.3.4). ®

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
How long is too long to wait for a security fix?
Synology finally patches OpenSSL bugs in Trevor's NAS
Secure microkernel that uses maths to be 'bug free' goes open source
Hacker-repelling, drone-protecting code will soon be yours to tweak as you see fit
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.