Feeds

SSH hits the fan for Cisco on security

Nine-month old risk resurfaces

  • alert
  • submit to reddit

Security for virtualized datacentres

Cisco products, including its PIX firewall, are subject to multiple vulnerabilities in Secure Shell (SSH) despite the fact problems with the protocol have been known about for almost a year.

The networking giant today issued a notice to customers which warns that by exploiting weaknesses "inherent" in SSH protocol version 1.5 "it is possible to insert an arbitrary commands into an established SSH session".

Attackers might also be able to "collect information that may help in brute force key recovery, or brute force a session key", the notice said.

Mark Read, a security consultant at MIS Corporate Defence Solutions, downplayed the risk posed by the bugs, which he said posed no immediate threat, and in any case depend on already having access to an internal network.

"In order to exploit these bugs you need to be able to sniff traffic or have already penetrated a firm's external box, which also happens to be a hub. This is easier said than done and would take a lot of skill certainly far beyond that needed to exploit a Microsoft glitch," said Read.

Read was puzzled why Cisco had issued a notice at this time. He said its been well known for the last nine months in the security community that version one of SSH was flawed.

SSH provides a secure way to remotely manage networked devices and a wide variety of Cisco kit is affected by the vulnerability. These include Cisco switches and routers running Cisco IOS software and supporting SSH, Catalyst 6000 LAN switches running CatOS as well as the networking giant's PIX Firewall.

Cisco has said its possible to limit the scope of the vulnerability by preventing, or having a control over, the interception of SSH traffic. It has also published a plan for the delivery of fixed software releases, and said upgrades to fix the problem should be available "free of charge".

Customers unsuccessful at obtaining fixed software through resellers are advised to contact the Cisco Technical Assistance Centre (TAC). ®

External Links

Cisco's security notice

Related Stories

Multiple flaws in Cisco router software exposed
Cisco routers vulnerable to easy attack
Cisco 600 routers offer cracker fun
LDAP flap as passwords put at risk

Beginner's guide to SSL certificates

More from The Register

next story
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?
Edward who? GCHQ boss dodges Snowden topic during last speech
UK spies would rather 'walk' than do 'mass surveillance'
Microsoft pulls another dodgy patch
Redmond makes a hash of hashing add-on
NOT OK GOOGLE: Android images can conceal code
It's been fixed, but hordes won't have applied the upgrade
Apple grapple: Congress kills FBI's Cupertino crypto kybosh plan
Encryption would lead us all into a 'dark place', claim G-Men
DEATH by PowerPoint: Microsoft warns of 0-day attack hidden in slides
Might put out patch in update, might chuck it out sooner
'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
prev story

Whitepapers

Cloud and hybrid-cloud data protection for VMware
Learn how quick and easy it is to configure backups and perform restores for VMware environments.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
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?
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.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.