Feeds

Popular open source DHCP program open to hack attacks

Beware of rogue meta-characters

Securing Web Applications Made Simple and Scalable

The makers of the internet's most popular open source DHCP program have warned that it's vulnerable to hacks that allow attackers to remotely execute malicious code on underlying machines.

The flaw, which is present in Internet Systems Consortium's DHCP versions prior to 3.1-ESV-R1, 4.1-ESV-R2, and 4.2.1-P1, stems from the program's failure to block commands that contain certain meta-characters. The vulnerability makes it possible for rogue servers on a targeted network to remotely execute malicious code on the client, the non-profit ISC warned on Tuesday.

ISC advises users to upgrade. Users can in some cases follow workarounds, which include disabling hostname updates or configuring their systems to access only legitimate DHCP servers in settings where access control lists are in place.

Short for Dynamic Host Configuration Protocol, DHCP is a system for automatically assigning computers IP addresses on a given network and helping administrators to keep track of those assignments. ISC says its DHCP program is the most widely used open source DHCP implementation on the Internet.

Sophos has more about the vulnerability here. ®

The smart choice: opportunity from uncertainty

More from The Register

next story
BMW's ConnectedDrive falls over, bosses blame upgrade snafu
Traffic flows up 20% as motorway middle lanes miraculously unclog
Putin: Crack Tor for me and I'll make you a MILLIONAIRE
Russian Interior Ministry offers big pile o' roubles for busting pro-privacy browser
Mozilla fixes CRITICAL security holes in Firefox, urges v31 upgrade
Misc memory hazards 'could be exploited' - and guess what, one's a Javascript vuln
Manic malware Mayhem spreads through Linux, FreeBSD web servers
And how Google could cripple infection rate in a second
How long is too long to wait for a security fix?
Synology finally patches OpenSSL bugs in Trevor's NAS
Don't look, Snowden: Security biz chases Tails with zero-day flaws alert
Exodus vows not to sell secrets of whistleblower's favorite OS
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

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
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.
Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.