Menu
Cisco fixes serious denial-of-service flaws in wireless LAN controllers, other products

Cisco fixes serious denial-of-service flaws in wireless LAN controllers, other products

One of the vulnerabilities is critical and the rest are rated as high severity

Cisco Systems has released patches to fix serious denial-of-service flaws in its Wireless LAN Controller (WLC) software, Cisco Adaptive Security Appliance (ASA) software and the Secure Real-Time Transport Protocol (SRTP) library that's used in many products.

The Cisco WLC software contains two denial-of-service vulnerabilities, one of which is rated critical and could be exploited by an unauthenticated attacker through specially crafted HTTP requests sent to the device. This can cause a buffer overflow condition that, in addition to a device reload, might also allow for execution of arbitrary code on the device.

The second vulnerability, rated high, stems from how the Cisco WLC software handles Bonjour traffic and can be exploited in a similar manner as the HTTP one to cause a device reload.

A third DoS vulnerability was patched in the Cisco AireOS software that also runs on some of the company's Wireless LAN Controller devices. It can be exploited by an unauthenticated hacker by attempting to access a URL that is not generally accessible from and supported by the device's management interface.

The software, used in the Cisco ASA 5500-X Series Next-Generation Firewalls, Cisco ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers and the Cisco Adaptive Security Virtual Appliance (ASAv), has a flaw stemming from an insufficient validation of DHCPv6 packets.

The vulnerability only affects the Cisco ASA Software if it's configured with the DHCPv6 relay feature and can only be triggered by IPv6 traffic, Cisco said in an advisory.

Finally, a DoS vulnerability in libSRTP that could be exploited through specially crafted SRTP packets, was fixed through software updates for multiple products that use the library for some features. The list of affected products is long but includes Cisco WebEx Meetings Server, Cisco Jabber, Cisco Adaptive Security Appliance (ASA) Software, Cisco IOS XE Software and many Cisco voice and unified communications devices.


Follow Us

Join the newsletter!

Error: Please check your email address.

Featured

Slideshows

Kiwi channel closes 2017 with After Hours

Kiwi channel closes 2017 with After Hours

The channel in New Zealand came together to celebrate the close of 2017, as the final After Hours played out in front of a bumper Auckland crowd.

Kiwi channel closes 2017 with After Hours
Meet the top performing HP partners in NZ

Meet the top performing HP partners in NZ

HP honoured leading partners across the channel at the Partner Awards 2017 in New Zealand, recognising excellence across the entire print and personal systems portfolio.

Meet the top performing HP partners in NZ
Tech industry comes together as Lexel celebrates turning 30

Tech industry comes together as Lexel celebrates turning 30

Leading figures within the technology industry across New Zealand came together to celebrate 30 years of success for Lexel Systems, at a milestone birthday occasion at St Matthews in the City.​

Tech industry comes together as Lexel celebrates turning 30
Show Comments