Feeds

Cisco wireless flaws pose DoS risk

Wi-Fi kit found wanting

Internet Security Threat Report 2014

Cisco is urging admins to update their wireless LAN hardware following the discovery of multiple vulnerabilities in its enterprise Wi-Fi kit.

Security flaws in Cisco Wireless LAN Controllers, Cisco Catalyst 6500 Wireless Services Modules (WiSMs), and Cisco Catalyst 3750 Integrated Wireless LAN Controllers create a mechanism for hackers to knock over vulnerable hardware.

All Cisco Wireless LAN Controllers running version 4.2 of the network giant's software are affected by a pair of denial of service flaws. A third DoS flaw affects software versions 4.1 and later.

The denial of service bugs include a flaw in the handling of Web authentication, which can cause an affected device to reload, and a separate flaw (that also affects version 4.1 of the software) that means vulnerable kit can freeze up on receipt of malformed data packets.

The same set of potential problems affects Cisco Catalyst 6500 Series/7600 Series Wireless Services Module and Cisco Catalyst 3750 Series Integrated Wireless LAN Controllers but not the equivalent wireless modules on Cisco 2800 and 3800 series Integrated Services Routers. Cisco 2000 and 2100 Series Wireless LAN Controllers are also unaffected by the vulnerability.

The denial of service problem is not the only issue to consider. Version 4.2.173.0 of Cisco's Wireless LAN controller software is affected by a privilege escalation vulnerability. The security bug creates a means for an ordinary user to gain full administrative rights.

"Successful exploitation of the denial of service vulnerabilities may cause the affected device to hang or reload," a security advisory from Cisco explains. "Repeated exploitation could result in a sustained DoS condition. The privilege escalation vulnerability may allow an authenticated user to obtain full administrative rights on the affected system."

Cisco said it discovered the flaws via customer support cases and internal testing. There is no evidence to suggest that the flaws have been used by hackers. However, especially in the absence of a suitable workaround, patching affected systems sooner rather than later makes sense. ®

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
'Regin': The 'New Stuxnet' spook-grade SOFTWARE WEAPON described
'A degree of technical competence rarely seen'
You really need to do some tech support for Aunty Agnes
Free anti-virus software, expires, stops updating and p0wns the world
You stupid BRICK! PCs running Avast AV can't handle Windows fixes
Fix issued, fingers pointed, forums in flames
Regin: The super-spyware the security industry has been silent about
NSA fingered as likely source of complex malware family
Privacy bods offer GOV SPY VICTIMS a FREE SPYWARE SNIFFER
Looks for gov malware that evades most antivirus
Patch NOW! Microsoft slings emergency bug fix at Windows admins
Vulnerability promotes lusers to domain overlords ... oops
HACKERS can DELETE SURVEILLANCE DVRS remotely – report
Hikvision devices wide open to hacking, claim securobods
prev story

Whitepapers

Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
10 threats to successful enterprise endpoint backup
10 threats to a successful backup including issues with BYOD, slow backups and ineffective security.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Protecting users from Firesheep and other Sidejacking attacks with SSL
Discussing the vulnerabilities inherent in Wi-Fi networks, and how using TLS/SSL for your entire site will assure security.