Feeds

Critical Kerberos bugs surface

Action stations

  • alert
  • submit to reddit

SANS - Survey on application security programs

Multiple vulnerabilities have been reported in version five of the widely-used Kerberos authentication protocol. The most serious could be exploited by crackers to gain root control to authentication servers.

Exploits are yet to surface and patches are available. All releases of MIT Kerberos 5 up to and including krb5-1.3.4 are affected. At fault are "double-free vulnerabilities" in MIT Kerberos 5 implementation's Key Distribution Center (KDC) program and libraries. Double free vulnerabilities arise when programs try to free up the same portion of system memory twice, in this case creating a possible means for a remote attacker to execute arbitrary code on target systems.

Also, an error in the ASN.1 decoder of MIT Kerberos 5 could be used to cause vulnerable systems to hang. An attacker would be able to carry out this denial of service attack without first having to log onto vulnerable systems.

Developers are advised to update to version krb5-1.3.5, when it becomes available. In the meantime, MIT has published patches to address the vulnerability in earlier versions of its code. A summary of the products affected - along with responses from vendors - is here. Some users of Cisco VPN 3000 Series Concentrators will, for example, need to update their software .

Kerberos was developed by MIT and is a popular means for securely authenticating a request for a service in a computer network. The name derives from Greek mythology, where Cerberus is the three-headed dog guarding the gates of Hades. ®

Related stories

Kerberos Redux?
Kerberos bug bites
Sun library bug affects *Nix and Kerberos

High performance access to file storage

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Putin tells Snowden: Russia conducts no US-style mass surveillance
Gov't is too broke for that, Russian prez says
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
Heartbleed exploit, inoculation, both released
File under 'this is going to hurt you more than it hurts me'
Arts and crafts store Michaels says 3 million credit cards exposed in breach
Meanwhile, Target investigators prepare for long process in nabbing hackers
Canadian taxman says hundreds pierced by Heartbleed SSL skewer
900 social insurance numbers nicked, says revenue watchman
prev story

Whitepapers

SANS - Survey on application security programs
In this whitepaper learn about the state of application security programs and practices of 488 surveyed respondents, and discover how mature and effective these programs are.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.