Kernel Bug Lay Undiscovered for Eight Years
A Linux kernel bug in network socket initialization could allow an attacker to acquire root privileges to inflict damages. The security hole applies to all kernels of the 2.4 and 2.6 series and has been around possibly since 2001.
Source of the bug is a NULL pointer dereference caused by an incorrectly implemented function during socket initialization. Pointers should have redirected the function to a predefined stub routine, but some protocols leave these pointers uninitialized. The list of affected protocols is pretty long: Appletalk, IPX, X.25, IRDA, Bluetooth, ISDN, AX25, SCTP via IPv6 and IUCV, although there may be more.
The kernel validates the pointers before executing most of the relevant functions. However, it was found that the sock_sendpage() routine bybasses the validation and accepts the NULL pointer. An attacker can thereby inflict some damage with code on the first page executed with root privileges. A precondition, however, is that the attacker already has code modification privileges as user, which precludes any remote attack possibilities.
A few exploits were already prepared for the vulnerability, but a relevant kernel patch now exists in Git. Most distros should implement their own security patches for the affected protocols for their delivered kernel versions.
great postThanks a lot for sharing the article on cash. That's a awesome article. I enjoyed the article a lot while reading. Thanks for sharing such a wonderful article.I want to say very thank you for this great informations. now i understand about it. Thank you !
Naivete"t's been found, and it's been fixed. In addition it was never exploited, as it was never found until recently, had it been found earlier it would have been fixed earlier.
If on the other hand it had been known about and exploits available, and it had never been fixed,then there would be something to get upset about."
The comment above may be a bit naive? Just because it was not found by kernel developers until recently does not mean that the bug may not have been exploited.
WhyIt's been found, and it's been fixed. In addition it was never exploited, as it was never found until recently, had it been found earlier it would have been fixed earlier.
If on the other hand it had been known about and exploits available, and it had never been fixed,then there would be something to get upset about.
kernel typo - (I hope)
Uh, that applies to all kernels of the 2.4 - 2.6 series...
quote: "2.6, from 2.6.0 up to and including 184.108.40.206"
I hope this was just a typo, because leaving out that it affects the 2.6 series would be a large blunder.
New tool will look like GParted but support a wider range of storage technologies.
New public key pinning feature will help prevent man-in-the-middle attacks.
Carnegie Mellon researchers say 3 million pages could fall down the phishing hole in the next year.
The US government rolls new best-practice rules for protecting SSH.
Klaus Knopper announces the latest version of his iconic Live Linux system.
All websites that use these popular CMS tools could be vulnerable to denial of service attacks if users don't install the updates.
According to a report, many potential victims of the Heartbleed attack have patched their systems, but few have cleaned up the crime scene to protect themselves from the effects of a previous intrusion.
DARPA and NICTA release the code for the ultra-secure microkernel system used in aerial drones.
Should you trust an online service to store your online passwords?
New B+ board lets you build cool things without the complication of a powered USB hub.