Feeds

Cisco ships six fixes for DoS bugs

Happy Thursday, sysadmins

Top 5 reasons to deploy VMware with Tegile

Sysadmins can get themselves ready for a busy Cisco “patch Thursday”, after the Borg lobbed six patches out the door to deal with a range of denial-of-service (DoS) vulnerabilities in IOS.

The vulnerabilities – see here for a single list – are all scored a CVS base score better than 7 as being remotely exploitable without authentication. Most boil down to how various bits of IOS handle (or don't handle) malformed packets.

Taking them one-by-one:

  • SIP DoS in IOS – Some SIP messages, even though they'd be considered “well-formed”, can trigger a device reload. IOS XE Software release 3.10.0S and 3.10.1S are affected and a fix is available.
  • Key exchange module – the Internet Key Exchange module, IKEv2, can be crashed with a malformed packet. Customers are advised to upgrade to a non-vulnerable version of IOS XE.
  • IOS NAT – Malformed DNS packets can crash the NAT in various IOS versions. Fixed versions are available.
  • IOS SSL VPNs – the SSL subsystem in IOS is vulnerable to crafted HTML requests “designed to consume memory to an affected device”. Various IOS 15.1, 15.2, 15.3 and 15.4 releases are affected, with fixes available.
  • IOS and IOS XE IPv6 stack – can be crashed with crafted IPv6 packets, with fixes available.
  • 7600 Switch Processor with 10 Gbps Ethernet uplinks – crafted IP packets can crash the Kailash FPGA in versions prior to 2.6, with fixes available.

Happy network patch day, network admins!®

Beginner's guide to SSL certificates

More from The Register

next story
It's Big, it's Blue... it's simply FABLESS! IBM's chip-free future
Or why the reversal of globalisation ain't gonna 'appen
'Hmm, why CAN'T I run a water pipe through that rack of media servers?'
Leaving Las Vegas for Armenia kludging and Dubai dune bashing
Microsoft and Dell’s cloud in a box: Instant Azure for the data centre
A less painful way to run Microsoft’s private cloud
Facebook slurps 'paste sites' for STOLEN passwords, sprinkles on hash and salt
Zuck's ad empire DOESN'T see details in plain text. Phew!
CAGE MATCH: Microsoft, Dell open co-located bit barns in Oz
Whole new species of XaaS spawning in the antipodes
AWS pulls desktop-as-a-service from the PC
Support for PCoIP protocol means zero clients can run cloudy desktops
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.