Riku Hietamaki

A denial of service issue exists due to the way the Server Message Block (SMB) Protocol software handles specially crafted SMB compounded requests. This can be exploited by sending a specially crafted network message to a computer running the Server service, allowing remote attackers to cause a system hang. No authentication is required for an attacker to exploit this issue.

The issue affects the Quagga package, allowing remote attackers to cause a denial of service via a Link State Update message with an invalid IPv6 prefix length. This can lead to disruption of confidentiality, integrity, and availability of protected information. The exploitation can be carried out remotely.

The issue allows remote attackers to cause a denial of service via trailing zero values in the Link State Advertisement (LSA) header list of an IPv6 Database Description message. This is due to the `ospf6 lsa is changed` function in `ospf6 lsa.c` in the OSPFv3 implementation in `ospf6d`. The vulnerability can lead to disruption of confidentiality, integrity, and availability of protected information.

The issue affects the Quagga package in various Linux operating systems, including Red Hat Enterprise Linux, CentOS, SUSE Linux Enterprise, and openSUSE. It allows remote attackers to cause a denial of service (daemon crash) via an invalid Link State Advertisement (LSA) type in an IPv4 Link State Update message. The `ospf flood` function in `ospf flood.c` in `ospfd` is vulnerable. This can lead to disruption of confidentiality, integrity, and availability of protected information.