Feeds

Cisco IOS DoS exploit released in the wild

Drop everything - get patching!

  • alert
  • submit to reddit

High performance access to file storage

The risk posed by a serious DoS vulnerability to a wide range of Cisco Systems routers and switches has been upgraded following the release of an exploit onto a full disclosure mailing list.

As we reported yesterday, The DoS vulnerability arises from a bug in Cisco's core IOS software which means vulnerable devices to stop processing inbound packets on receipt of maliciously constructed IPv4 packets. Normal service would be restored only with a manual reboot.

No alarms will be triggered, nor will the router reload to correct itself. Cisco IOS versions 11.x and 12.x prior to 12.3 are affected by the vulnerability. That means almost everybody is affected.

Cisco has released a fix but the concern is how much mischief could be wrought before admins get a chance to upgrade router software.

The situation was already bad and just got a whole lot worse with the release of exploit code into the wild.

In an update to its advisory, Cisco explains: "Since the initial posting of this document, the Cisco PSIRT has been made aware of public announcements of the vulnerabilities described in this advisory. Cisco PSIRT is aware that the exploit for this vulnerability has been published on a public mailing list."

Cisco has compiled a advisory detailing workarounds and available fixes, which network admins are urged in the strongest terms to promptly review. ®

High performance access to file storage

More from The Register

next story
Seagate brings out 6TB HDD, did not need NO STEENKIN' SHINGLES
Or helium filling either, according to reports
European Court of Justice rips up Data Retention Directive
Rules 'interfering' measure to be 'invalid'
Dropbox defends fantastically badly timed Condoleezza Rice appointment
'Nothing is going to change with Dr. Rice's appointment,' file sharer promises
Cisco reps flog Whiptail's Invicta arrays against EMC and Pure
Storage reseller report reveals who's selling what
Bored with trading oil and gold? Why not flog some CLOUD servers?
Chicago Mercantile Exchange plans cloud spot exchange
Just what could be inside Dropbox's new 'Home For Life'?
Biz apps, messaging, photos, email, more storage – sorry, did you think there would be cake?
IT bods: How long does it take YOU to train up on new tech?
I'll leave my arrays to do the hard work, if you don't mind
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
HP ArcSight ESM solution helps Finansbank
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.