Attackers prey on Windows DNS server flaw

Powered by SC Magazine
 

Vulnerability in Windows Server 2000 and 2003 being used for malware attacks.

Microsoft is warning users of a new attack targeting a vulnerability in Windows Server 2000 and 2003. 

Users of Windows XP and Vista are not vulnerable to the attack, which targets the domain name system (DNS) server component by using a specially-crafted remote procedure call (RPC).

DNS servers are used to link a server's IP address to its domain name. When executed, the exploit allows an attacker to remotely execute code on the target machine.

The vulnerability was first reported by Microsoft on 13 April as a proof-of-concept. By 16 April, two variants of attacks on the vulnerability were reported.

Security firm Secunia rated the vulnerability as 'highly critical', the company's second-highest alert level. 

Microsoft has listed a number of methods for administrators to mitigate the vulnerability, including disabling certain ports on a firewall and editing the machine's DNS registry.

All these moves, however, will disable the ability to remotely manage a machine's DNS server component via RPC commands.

Microsoft said that the number of reported attacks is very limited, and the company plans to have the vulnerability patched by next month's Patch Tuesday release, although it has not ruled out an earlier patch if attacks persist.

"Because DNS is a critical part of the networking infrastructure, they also have to be tested to ensure that changes introduced by the updates do not pose a greater risk than the security issue we are addressing," said Microsoft Security Response Center researcher Christopher Budd.

Copyright ©v3.co.uk


Attackers prey on Windows DNS server flaw
 
 
 
Top Stories
Earning the right to innovate
Breaking down the barriers to innovation is a long, but rewarding process, says Bank of Queensland Group CIO, Julie Bale.
 
A call for timely reporting
[Blog post] Businesses need incentives to keep customer data secure.
 
Doubts cast on Queensland's ICT Dashboard
Opposition, former Govt CIO say it can't be trusted.
 
 
Sign up to receive iTnews email bulletins
   FOLLOW US...
Latest Comments
Polls
What is delaying adoption of public cloud in your organisation?







   |   View results
Lock-in concerns
  26%
 
Application integration concerns
  3%
 
Security and compliance concerns
  29%
 
Unreliable network infrastructure
  9%
 
Data sovereignty concerns
  23%
 
Lack of stakeholder support
  3%
 
Protecting on-premise IT jobs
  5%
 
Difficulty transitioning CapEx budget into OpEx
  3%
TOTAL VOTES: 835

Vote