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Category:   OS (UNIX)  >   Ppp Vendors:   OpenBSD
(OpenBSD Issues Fix) BSD UNIX PPP LCP Options Length Buffer Overflow Lets Remote Users Deny Service
SecurityTracker Alert ID:  1016782
SecurityTracker URL:  http://securitytracker.com/id/1016782
CVE Reference:   CVE-2006-4304   (Links to External Site)
Date:  Sep 3 2006
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 3.8, 3.9
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:   OpenBSD has issued the following patches:

ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/009_sppp.patch
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.8/common/014_sppp.patch

Vendor URL:  www.openbsd.org/ (Links to External Site)
Cause:   Boundary error

Message History:   This archive entry is a follow-up to the message listed below.
Aug 24 2006 BSD UNIX PPP LCP Options Length Buffer Overflow Lets Remote Users Deny Service



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