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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Check for the version of the samba packages
Detailed Explanation for this Vulnerability Assessment
Updated samba packages that fix two denial of service vulnerabilities are
[Updated 23rd September 2004]
Packages have been updated to include the ppc64 packages which were left
out of the initial errata.
Samba provides file and printer sharing services to SMB/CIFS clients.
The Samba team has discovered a denial of service bug in the smbd daemon.
A defect in smbd's ASN.1 parsing permits a possible hacker to send a specially
crafted packet during the authentication request which will send the newly
spawned smbd process into an infinite loop. Given enough of these packets,
it is possible to exhaust the available memory on the server. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CVE-2004-0807 to this issue.
Additionally the Samba team has also discovered a denial of service bug in
the nmbd daemon. It is possible that a possible hacker could send a specially
crafted UDP packet which could permit the attacker to anonymously
crash nmbd. This issue only affects nmbd daemons which are configured to
process domain logons. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CVE-2004-0808 to this issue.
Users of Samba should upgrade to these updated packages, which contain an
upgrade to Samba-3.0.7, which is not vulnerable to these issues.
Solution : http://rhn.redhat.com/errata/RHSA-2004-467.html
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security
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