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Category:   OS (UNIX)  >   Ppp Vendors:   FreeBSD, NetBSD, OpenBSD
BSD UNIX PPP LCP Options Length Buffer Overflow Lets Remote Users Deny Service
SecurityTracker Alert ID:  1016745
SecurityTracker URL:  http://securitytracker.com/id/1016745
CVE Reference:   CVE-2006-4304   (Links to External Site)
Updated:  Sep 3 2006
Original Entry Date:  Aug 24 2006
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in PPP on BSD-based systems. A remote user can cause denial of service conditions.

The Point-to-Point Protocol (PPP) implementation on FreeBSD, OpenBSD, and NetBSD does not properly validate Line Control Protocol (LCP) options. A remote user (on the PPP connection) can send specially crafted data to cause the target kernel to panic.

It is not known if remote code execution is possible or not.

Pavel Cahyna discovered this vulnerability.

Impact:   A remote user can cause the target system to crash.
Solution:   A fix is available from FreeBSD, OpenBSD, and NetBSD.
Cause:   Boundary error

Message History:   This archive entry has one or more follow-up message(s) listed below.
Aug 24 2006 (FreeBSD Issues Fix) BSD UNIX PPP LCP Options Length Buffer Overflow Lets Remote Users Deny Service
FreeBSD has released a fix.
Aug 24 2006 (NetBSD Issues Fix) BSD UNIX PPP LCP Options Length Buffer Overflow Lets Remote Users Deny Service
NetBSD has released a fix.
Sep 3 2006 (OpenBSD Issues Fix) BSD UNIX PPP LCP Options Length Buffer Overflow Lets Remote Users Deny Service
OpenBSD has issued a fix for OpenBSD 3.8 and 3.9.



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