Responding to the mishap, Digital Defense changed its policies that cover the release of advisories. Sign off from senior management in the form of a digital signature is now required before the release of any information, Fleming said.
Samba is a standard part of many Linux and Unix distributions including those released by Red Hat, MandrakeSoft, and Debian. All previous versions of Samba up to Version 2.2.8 are affected by the vulnerability.
Despite the fact that the vulnerability is widespread, it is unlikely that it could be exploited from remote users on the Internet, according to Fleming.
"We found very few instances, if any, of somebody who has a Samba share on their extranet side. If they did [have such a share] it was on a server that already gives access to everybody anyway," Fleming said.
The risk for most Samba users is from internal attacks, he said.
Digital Defense urged Samba users to check their Samba servers for signs of compromise and to apply patches for the vulnerability or upgrade to Samba 2.2.8a. (See http://www.samba.org.)
By Monday, major Linux and Unix vendors were notifying users of the problem and releasing software updates that fixed the Samba vulnerability for their own products.
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