Microsoft Patches Critical Virtual Machine Flaw

[InfoSec News <isn () c4i org>]

http://www.eweek.com/article2/0,3959,1013566,00.asp

By  Dennis Fisher 
April 9, 2003

Microsoft Corp. on Wednesday released a patch for a critical new flaw
in its Virtual Machine Java implementation that gives an attacker the
ability to run code on a vulnerable computer.

The Virtual Machine is included in nearly every version of Windows as
well as in most version of Internet Explorer.

The vulnerability is in the ByteCode Verifier component of the VM,
which is part of the class-verification process. The component does
not correctly check for the presence of some malicious code as Java
applets are loaded.

The most likely way for an attacker to exploit this flaw is by
creating a malicious Java applet, embedding it in a Web page and then
either enticing a user to visit the page or e-mailing the page to the
user.

The patch for this vulnerability is available here.

The Redmond, Wash., company also released a fix for a problem in both
the Winsock Proxy service in Proxy Server 2.0 and the firewall service
in the ISA Server 2000. If an attacker sent a specially crafted packet
to a vulnerable machine, the packet would cause a denial-of-service
condition.

The patch for this issue is here [1].

[1] http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS03-012.asp



-
ISN is currently hosted by Attrition.org

To unsubscribe email majordomo () attrition org with 'unsubscribe isn'
in the BODY of the mail.