Feeds

Cisco plugs IP telephony and router security holes

A patch in time...

Boost IT visibility and business value

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. ®

Gartner critical capabilities for enterprise endpoint backup

More from The Register

next story
Microsoft: We plan to CLEAN UP this here Windows Store town
Paid-for apps that provide free downloads? Really
Snowden on NSA's MonsterMind TERROR: It may trigger cyberwar
Plus: Syria's internet going down? That was a US cock-up
Who needs hackers? 'Password1' opens a third of all biz doors
GPU-powered pen test yields more bad news about defences and passwords
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
Hear ye, young cyber warriors of the realm: GCHQ wants you
Get involved, get a job and then never discuss work ever again
Chinese hackers spied on investigators of Flight MH370 - report
Classified data on flight's disappearance pinched
Microsoft cries UNINSTALL in the wake of Blue Screens of Death™
Cache crash causes contained choloric calamity
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.
7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
BYOD's dark side: Data protection
An endpoint data protection solution that adds value to the user and the organization so it can protect itself from data loss as well as leverage corporate data.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?