Vulnerability Assessment & Network Security Forums
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
Samba: Denial of Service vulnerabilities
Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200409-16
(Samba: Denial of Service vulnerabilities)
There is a defect in smbd's ASN.1 parsing. A bad packet received during the
authentication request could throw newly-spawned smbd processes into an
infinite loop (CVE-2004-0807). Another defect was found in nmbd's
processing of mailslot packets, where a bad NetBIOS request could crash the
nmbd process (CVE-2004-0808).
A remote attacker could send specially crafted packets to trigger both
defects. The ASN.1 parsing issue can be exploited to exhaust all available
memory on the Samba host, potentially denying all service to that server.
The nmbd issue can be exploited to crash the nmbd process, resulting in a
Denial of Service condition on the Samba server.
There is no known workaround at this time.
All Samba 3.x users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=net-fs/samba-3.0.7"
# emerge ">=net-fs/samba-3.0.7"
Network Security Threat Level: Medium
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2005 Michel Arboi
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