Feeds

SSL toolkit flaw poses risk

RSA patch

  • alert
  • submit to reddit

Choosing a cloud hosting partner with confidence

A vulnerability has been discovered in versions of software development toolkits from RSA Security, which could allow an attacker to bypass SSL client authentication.

In a security notice on the issue, RSA said the vulnerability meant that hackers "might potentially gain access to data intended only for authorised users". The company has a patch and it advises customers to apply this to affected software.

Due to a bug in the SSL (Secure Socket Layer) session cacheing feature implemented in RSA BSAFE SSL-J versions 3.x, unauthorised clients may be able to impersonate authorised clients, RSA confirms.

The problem does not affect clients nor does it impact the performance of servers which do not use client authentication. But the vulnerability is noteworthy because it affects commonly used-cryptographic protection techniques.

It's been discovered that (with use of the vulnerable software libraries) if an error occurs while the handshake is being performed, the session key is, under certain conditions, stored in the cache when it should be discarded.

Once cached, this session key can be used by an attacker to cause a server to skip the full client authentication scheme, and use a much shorter sign-on procedure.

The SSL protocol provides for caching of SSL sessions between subsequent connections by the same user; this speeds up connections and lower processing overhead in most cases. The flaw would not give a user root access to a server.

The issue affects RSA BSAFE SSL-J 3.0, 3.01 and 3.1 and Cisco Internet Content Distribution Network 2.0 (because of its use of the toolkit). Users of RSA BSAFE SSL-J 1.x and 2.x are unaffected, as are RSA customers using BSAFE SSL-J 3.1.1 or 4.0 beta 2 and higher. ®

External links

RSA Security Bulletin
Cisco advice to iCDN network

Related Stories

Secure the Wireless Network firmware
RSA poses $200,000 crypto challenge
RSA takes a long-term risk on safety
Internet security firm RSA's Web site hacked

Beginner's guide to SSL certificates

More from The Register

next story
Russian hackers exploit 'Sandworm' bug 'to spy on NATO, EU PCs'
Fix imminent from Microsoft for Vista, Server 2008, other stuff
Microsoft pulls another dodgy patch
Redmond makes a hash of hashing add-on
FYI: OS X Yosemite's Spotlight tells Apple EVERYTHING you're looking for
It's on by default – didn't you read the small print?
'LulzSec leader Aush0k' found to be naughty boy not worthy of jail
15 months home detention leaves egg on feds' faces as they grab for more power
Forget passwords, let's use SELFIES, says Obama's cyber tsar
Michael Daniel wants to kill passwords dead
FBI boss: We don't want a backdoor, we want the front door to phones
Claims it's what the Founding Fathers would have wanted – catching killers and pedos
Kill off SSL 3.0 NOW: HTTPS savaged by vicious POODLE
Pull it out ASAP, it is SWISS CHEESE
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.
Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
Three 1TB solid state scorchers up for grabs
Big SSDs can be expensive but think big and think free because you could be the lucky winner of one of three 1TB Samsung SSD 840 EVO drives that we’re giving away worth over £300 apiece.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.