Feeds

Cisco plugs IP telephony and router security holes

A patch in time...

The Power of One eBook: Top reasons to choose HP BladeSystem

Cisco has fixed updates to address flaws in its IP telephony software and router hardware that create a means to conduct denial of service attacks against vulnerable systems. Neither flaw is particularly easy to exploit but both merit attention.

Security weaknesses in various flavours of Cisco CallManager 3.x and 4.x create a means to consume a large amount of memory and CPU resources via multiple open connections to port 2000. A separate flaw in the processing of connections to ports 2001, 2002, and 7727 might force Cisco CallManager to reboot.

Cisco has released updates as explained in its advisory here. A separate update, also issued this week, resolves a privilege escalation flaw in CallManager.

Meanwhile flaws have emerged in Cisco's core IOS software that might be exploited by hackers to crash vulnerable systems running Cisco IOS 12.x. The flaw stems from errors in handling the SGBP protocol (Stack Group Bidding Protocol).

As a result malicious UDP datagrams sent to port 9900 can cause routers to become tied up, triggering a hardware reset. The vuln affects Cisco network devices running vulnerable versions of IOS providing support for the SGBP protocol has been enabled, which won't always be the case.

Cisco has released an advisory which explains how users can get updates. ®

Designing a Defense for Mobile Applications

More from The Register

next story
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
How long is too long to wait for a security fix?
Synology finally patches OpenSSL bugs in Trevor's NAS
Roll out the welcome mat to hackers and crackers
Security chap pens guide to bug bounty programs that won't fail like Yahoo!'s
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
Researcher sat on critical IE bugs for THREE YEARS
VUPEN waited for Pwn2Own cash while IE's sandbox leaked
Four fake Google haxbots hit YOUR WEBSITE every day
Goog the perfect ruse to slip into SEO orfice
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
prev story

Whitepapers

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.
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.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Seven Steps to Software Security
Seven practical steps you can begin to take today to secure your applications and prevent the damages a successful cyber-attack can cause.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.