GLSA-200409-16 : Samba: Denial of Service vulnerabilities
Medium Nessus Plugin ID 14710
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe 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 (CAN-2004-0807). Another defect was found in nmbd's processing of mailslot packets, where a bad NetBIOS request could crash the nmbd process (CAN-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.
SolutionAll 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'