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dhcp vulnerability

Description

It was discovered that the DHCP client as included in dhcp3 did not verify the length of certain option fields when processing a response from an IPv4 dhcp server. If a user running Ubuntu 6.06 LTS or 8.04 LTS connected to a malicious dhcp server, a remote attacker could cause a denial of service or execute arbitrary code as the user invoking the program, typically the 'dhcp' user. For users running Ubuntu 8.10 or 9.04, a remote attacker should only be able to cause a denial of service in the DHCP client. In Ubuntu 9.04, attackers would also be isolated by the AppArmor dhclient3 profile.


Affected Package


OS OS Version Package Name Package Version
Ubuntu 9.04 dhcp3-client 3.1.1-5ubuntu8.1
Ubuntu 9.04 dhcp3-client-udeb 3.1.1-5ubuntu8.1
Ubuntu 8.10 dhcp3-client 3.1.1-1ubuntu2.1
Ubuntu 8.10 dhcp3-client-udeb 3.1.1-1ubuntu2.1
Ubuntu 8.04 dhcp3-client 3.0.6.dfsg-1ubuntu9.1
Ubuntu 8.04 dhcp3-client-udeb 3.0.6.dfsg-1ubuntu9.1
Ubuntu 6.06 dhcp3-client 3.0.3-6ubuntu7.1
Ubuntu 6.06 dhcp3-client-udeb 3.0.3-6ubuntu7.1

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