RHSA-2009:1154: Critical: dhcp security update

First published: Tue Jul 14 2009(Updated: )

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows<br>individual devices on an IP network to get their own network configuration<br>information, including an IP address, a subnet mask, and a broadcast<br>address.<br>The Mandriva Linux Engineering Team discovered a stack-based buffer<br>overflow flaw in the ISC DHCP client. If the DHCP client were to receive a<br>malicious DHCP response, it could crash or execute arbitrary code with the<br>permissions of the client (root). (CVE-2009-0692)<br>An insecure temporary file use flaw was discovered in the DHCP daemon's<br>init script ("/etc/init.d/dhcpd"). A local attacker could use this flaw to<br>overwrite an arbitrary file with the output of the "dhcpd -t" command via<br>a symbolic link attack, if a system administrator executed the DHCP init<br>script with the "configtest", "restart", or "reload" option.<br>(CVE-2009-1893)<br>Users of DHCP should upgrade to these updated packages, which contain<br>backported patches to correct these issues.

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