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Category:   Application (Generic)  >   Dhcp Vendors:   ISC (Internet Software Consortium)
DHCP dhclient Stack Overflow in script_write_params() Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1022548
SecurityTracker URL:  http://securitytracker.com/id/1022548
CVE Reference:   CVE-2009-0692   (Links to External Site)
Date:  Jul 14 2009
Impact:   Execution of arbitrary code via network, Root access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 3.1.2p1, 4.0.1p1, 4.1.0p1
Description:   A vulnerability was reported in the DHCP dhclient. A remote server can execute arbitrary code on the target system.

A remote server can return a specially crafted leased address and subnet-mask value to the connected dhclient to trigger a stack overflow in the script_write_params() function and execute arbitrary code on the target system. The code will run with root privileges.

Mandriva Linux Engineering Team reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system with root privileges.
Solution:   The vendor has issued a fix (3.1.2p1, 4.0.1p1, 4.1.0p1).

The vendor's advisory is available at:

https://www.isc.org/node/468

Vendor URL:  www.isc.org/node/468 (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jul 14 2009 (Red Hat Issues Fix) DHCP dhclient Stack Overflow in script_write_params() Lets Remote Users Execute Arbitrary Code
Red Hat has released a fix for Red Hat Enterprise Linux 4 and 4.7 Extended Update Support.
Jul 14 2009 (Red Hat Issues Fix) DHCP dhclient Stack Overflow in script_write_params() Lets Remote Users Execute Arbitrary Code
Red Hat has released a fix for Red Hat Enterprise Linux 3.
Jul 15 2009 (NetBSD Issues Fix) DHCP dhclient Stack Overflow in script_write_params() Lets Remote Users Execute Arbitrary Code
NetBSD has issued a fix.



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