DoS Attack Exploit in BIND 9
A specially crafted dynamic update message to a DNS zone for which the server is a master can raise havoc in BIND 9. An active remote exploit is already "in wide circulation."
All BIND 9 versions are affected, hence a recommended immediate update to 9.4.3-P3, 9.5.1-P3 or 9.6.1-P1. A number of Linux distros have already reacted with updated versions, among them Debian and Ubuntu.
A certain NSUPDATE from an unauthenticated attacker can bring the entire server down, creating a denial-of-service (DoS) condition. The security bulletin indicates that the vulnerability "affects all servers and is not limited to those that are configured to allow dynamic updates." The only mitigating condition is that the attack works only against DNS master servers for one or more zones and not against slave servers.
Downloads of the recommended BIND patches are available in the ISC security bulletin.
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you’ve found an article to be beneficial.

News
-
openSUSE Tumbleweed Ditches AppArmor for SELinux
If you're an openSUSE Tumbleweed user, you can expect a major change to the distribution.
-
Plasma 6.3 Now Available
Plasma desktop v6.3 has a couple of pretty nifty tricks up its sleeve.
-
LibreOffice 25.2 Has Arrived
If you've been hoping for a release that offers more UI customizations, you're in for a treat.
-
TuxCare Has a Big AlmaLinux 9 Announcement in Store
TuxCare announced it has successfully completed a Security Technical Implementation Guide for AlmaLinux OS 9.
-
First Release Candidate for Linux Kernel 6.14 Now Available
Linus Torvalds has officially released the first release candidate for kernel 6.14 and it includes over 500,000 lines of modified code, making for a small release.
-
System76 Refreshes Meerkat Mini PC
If you're looking for a small form factor PC powered by Linux, System76 has exactly what you need in the Meerkat mini PC.
-
Gnome 48 Alpha Ready for Testing
The latest Gnome desktop alpha is now available with plenty of new features and improvements.
-
Wine 10 Includes Plenty to Excite Users
With its latest release, Wine has the usual crop of bug fixes and improvements, along with some exciting new features.
-
Linux Kernel 6.13 Offers Improvements for AMD/Apple Users
The latest Linux kernel is now available, and it includes plenty of improvements, especially for those who use AMD or Apple-based systems.
-
Gnome 48 Debuts New Audio Player
To date, the audio player found within the Gnome desktop has been meh at best, but with the upcoming release that all changes.