BID:4852

Microsoft Windows 2000 Remote Access Service Buffer Overflow Vulnerability

Info

Microsoft Windows 2000 Remote Access Service Buffer Overflow Vulnerability

Bugtraq ID:	4852
Class:	Boundary Condition Error
CVE:
Remote:	No
Local:	Yes
Published:	May 27 2002 12:00AM
Updated:	May 27 2002 12:00AM
Credit:	Vulnerability discovery credited to Next Generation Security Software.
Vulnerable:	Microsoft Windows XP Professional Microsoft Windows XP Home Microsoft Windows XP 64-bit Edition Microsoft Windows NT Workstation 4.0 SP6a Microsoft Windows NT Workstation 4.0 SP6 Microsoft Windows NT Workstation 4.0 SP5 Microsoft Windows NT Workstation 4.0 SP4 Microsoft Windows NT Workstation 4.0 SP3 Microsoft Windows NT Workstation 4.0 SP2 Microsoft Windows NT Workstation 4.0 SP1 Microsoft Windows NT Workstation 4.0 Microsoft Windows NT Terminal Server 4.0 SP6 Microsoft Windows NT Terminal Server 4.0 SP5 Microsoft Windows NT Terminal Server 4.0 SP4 Microsoft Windows NT Terminal Server 4.0 SP3 Microsoft Windows NT Terminal Server 4.0 SP2 Microsoft Windows NT Terminal Server 4.0 SP1 Microsoft Windows NT Terminal Server 4.0 Microsoft Windows NT Server 4.0 SP6a + Avaya DefinityOne Media Servers + Avaya DefinityOne Media Servers + Avaya IP600 Media Servers + Avaya IP600 Media Servers + Avaya S3400 Message Application Server 0 + Avaya S8100 Media Servers 0 + Avaya S8100 Media Servers 0 Microsoft Windows NT Server 4.0 SP6 Microsoft Windows NT Server 4.0 SP5 Microsoft Windows NT Server 4.0 SP4 Microsoft Windows NT Server 4.0 SP3 Microsoft Windows NT Server 4.0 SP2 Microsoft Windows NT Server 4.0 SP1 Microsoft Windows NT Server 4.0 Microsoft Windows NT Enterprise Server 4.0 SP6a Microsoft Windows NT Enterprise Server 4.0 SP6 Microsoft Windows NT Enterprise Server 4.0 SP5 Microsoft Windows NT Enterprise Server 4.0 SP4 Microsoft Windows NT Enterprise Server 4.0 SP3 Microsoft Windows NT Enterprise Server 4.0 SP2 Microsoft Windows NT Enterprise Server 4.0 SP1 Microsoft Windows NT Enterprise Server 4.0 Microsoft Windows 2000 Server SP2 Microsoft Windows 2000 Server SP1 Microsoft Windows 2000 Server + Avaya DefinityOne Media Servers + Avaya IP600 Media Servers + Avaya S3400 Message Application Server 0 + Avaya S8100 Media Servers 0 Microsoft Windows 2000 Professional SP2 Microsoft Windows 2000 Professional SP1 Microsoft Windows 2000 Professional Microsoft Windows 2000 Datacenter Server SP2 Microsoft Windows 2000 Datacenter Server SP1 Microsoft Windows 2000 Datacenter Server Microsoft Windows 2000 Advanced Server SP2 Microsoft Windows 2000 Advanced Server SP1 Microsoft Windows 2000 Advanced Server

Not Vulnerable:

Discussion

Microsoft Windows 2000 Remote Access Service Buffer Overflow Vulnerability

Remote Access Service (RAS) is a service included in Microsoft Windows 2000, NT 4.0 and XP to allow users to connect to a corporate intranet or the Internet from a remote computer.

The RAS service included with several versions of Microsoft Windows is vulnerable to a buffer overflow issue. This may be exploited by a local attacker by creating a malicious phonebook entry. It is possible to gain elevated privileges, or create a denial of service condition.

** It has been reported that the Microsoft supplied patch to correct this issue may cause problems with PPTP RAS connections on Windows 2000 Professional. This problem has not been confirmed by SecurityFocus at this time. Microsoft also has not yet publicly acknowledged that this problem occurs.

** Microsoft has now released an updated patch version that correctly handles VPN connections.

Solution / Fix

Microsoft Windows 2000 Remote Access Service Buffer Overflow Vulnerability

Solution:
Microsoft has released patches to address this issue:

Microsoft Windows 2000 Server SP2