BID:7116

Microsoft Windows ntdll.dll Buffer Overflow Vulnerability

Info

Microsoft Windows ntdll.dll Buffer Overflow Vulnerability

Bugtraq ID:	7116
Class:	Boundary Condition Error
CVE:	CVE-2003-0109
Remote:	Yes
Local:	No
Published:	Mar 17 2003 12:00AM
Updated:	Jul 11 2009 09:06PM
Credit:	Announced by the vendor.
Vulnerable:	Microsoft Windows XP Professional SP1 Microsoft Windows XP Professional Microsoft Windows XP Home SP1 Microsoft Windows XP Home Microsoft Windows XP 64-bit Edition SP1 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 Terminal Services SP3 Microsoft Windows 2000 Terminal Services SP2 + Microsoft Windows 2000 Advanced Server SP2 + Microsoft Windows 2000 Datacenter Server SP2 + Microsoft Windows 2000 Server SP2 Microsoft Windows 2000 Terminal Services SP1 Microsoft Windows 2000 Terminal Services + Microsoft Windows 2000 Advanced Server + Microsoft Windows 2000 Datacenter Server + Microsoft Windows 2000 Server Microsoft Windows 2000 Server SP3 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 SP3 Microsoft Windows 2000 Professional SP2 Microsoft Windows 2000 Professional SP1 Microsoft Windows 2000 Professional Microsoft Windows 2000 Datacenter Server SP3 Microsoft Windows 2000 Datacenter Server SP2 Microsoft Windows 2000 Datacenter Server SP1 Microsoft Windows 2000 Datacenter Server Microsoft Windows 2000 Advanced Server SP3 Microsoft Windows 2000 Advanced Server SP2 Microsoft Windows 2000 Advanced Server SP1 Microsoft Windows 2000 Advanced Server Cisco Wireless Lan Solution Engine Cisco VPN/Security Management Solution Cisco Voice Manager Cisco User Registration Tool Cisco uOne Enterprise Edition Cisco Unity Server 4.0 Cisco Unity Server 3.3 Cisco Unity Server 3.2 Cisco Unity Server 3.1 Cisco Unity Server 3.0 Cisco Unity Server 2.46 Cisco Unity Server 2.4 Cisco Unity Server 2.3 Cisco Unity Server 2.2 Cisco Unity Server 2.1 Cisco Unity Server 2.0 Cisco Unity Server Cisco Transport Manager Cisco Trailhead Cisco SN 5428 Storage Router SN5428-3.3.2-K9 Cisco SN 5428 Storage Router SN5428-3.3.1-K9 Cisco SN 5428 Storage Router SN5428-3.2.2-K9 Cisco SN 5428 Storage Router SN5428-3.2.1-K9 Cisco SN 5428 Storage Router SN5428-2.5.1-K9 Cisco SN 5428 Storage Router SN5428-2-3.3.2-K9 Cisco SN 5428 Storage Router SN5428-2-3.3.1-K9 Cisco SN 5420 Storage Router 1.1.3 Cisco SN 5420 Storage Router 1.1 (7) Cisco SN 5420 Storage Router 1.1 (5) Cisco SN 5420 Storage Router 1.1 (4) Cisco SN 5420 Storage Router 1.1 (3) Cisco SN 5420 Storage Router 1.1 (2) - Microsoft Windows 2000 Professional SP2 - Microsoft Windows 2000 Professional SP1 - Microsoft Windows 2000 Professional - Microsoft Windows 95 - Microsoft Windows 98 - Microsoft Windows ME - Microsoft Windows NT 4.0 SP6a - Microsoft Windows NT 4.0 SP6 - Microsoft Windows NT 4.0 SP5 - Microsoft Windows NT 4.0 SP4 - Microsoft Windows NT 4.0 SP3 - Microsoft Windows NT 4.0 SP2 - Microsoft Windows NT 4.0 Cisco Small Network Management Solution Cisco Service Management Cisco Secure Scanner Cisco Secure Policy Manager 3.0.1 Cisco Secure Access Control Server 3.2.1 Cisco Routed Wan Management Cisco QoS Policy Manager Cisco Personal Assistant Cisco Networking Services for Active Directory Cisco Network Registar Cisco Media Blender Cisco Lan Management Solution Cisco IP/VC 3540 Video Rate Matching Module Cisco IP/VC 3540 Application Server Cisco IP Telephony Environment Monitor Cisco IP Contact Center Express Cisco IP Contact Center Enterprise Cisco Internet Service Node Cisco Intelligent Contact Manager 5.0 Cisco Intelligent Contact Manager Cisco Emergency Responder Cisco E-Mail Manager Cisco Dynamic Content Adapter Cisco DOCSIS CPE Configurator Cisco Customer Response Application Server Cisco Conference Connection Cisco Collaboration Server Cisco CiscoWorks VPN/Security Management Solution Cisco Call Manager 3.3 (3) Cisco Call Manager 3.3 Cisco Call Manager 3.2 Cisco Call Manager 3.1 (3a) Cisco Call Manager 3.1 (2) Cisco Call Manager 3.1 Cisco Call Manager 3.0 Cisco Call Manager 2.0 Cisco Call Manager 1.0 Cisco Call Manager Cisco Building BroadBand Service Manager Hotspot 1.0 Cisco Building Broadband Service Manager (BBSM) 5.2 Cisco Building Broadband Service Manager (BBSM) 5.1 Cisco Broadband Troubleshooter

Not Vulnerable:	Cisco Secure Access Control Server 3.2.2 Cisco Secure Access Control Server 3.2 (1.20)

Discussion

Microsoft Windows ntdll.dll Buffer Overflow Vulnerability

The Windows library ntdll.dll includes a function that does not perform sufficient bounds checking. The vulnerability is present in the function "RtlDosPathNameToNtPathName_U" and may be exploited through other programs that use the library if an attack vector permits it. One of these programs is the implementation of WebDAV that ships with IIS 5.0. The vector allows for the vulnerability in ntdll.dll to be exploited by a remote attacker.

Several other library functions which call the vulnerable ntdll.dll procedure have been identified. Administrators are advised to patch as other attack vectors are likely to surface.

** Microsoft has revised its advisory to state that this vulnerability affects Windows NT systems. As Windows NT does not support WebDAV, exploits using WebDAV as the attack vector will not be effective against Windows NT systems. Windows XP does not also include WebDAV by default, but other attack vectors may be possible, especially in cases where the attacker has interactive access to the system. WebDAV may be installed by a user on Windows XP with IIS 5.1, so WebDAV may be a possible means of exploitation in these circumstances.

** Reports suggest that numerous hosts have been scanned in an attempt to exploit this vulnerability. Although unconfirmed, this may be the result of a system of automated attacks.

** It has been reported that this vulnerability is also present in the "RtlGetFullPathName_U" function. The supplied Microsoft patch (Q815021) also corrects this function.

** It has been reported that the W32.Welchia.Worm, described in MCID 1811, is actively exploiting this vulnerability.

Exploit / POC

Microsoft Windows ntdll.dll Buffer Overflow Vulnerability

CORE has developed a working commercial exploit for their IMPACT product. This exploit is not otherwise publicly available or known to be circulating in the wild.

A proof-of-concept worm for WebDAV has been released, but is not known to be circulating in the wild at this time.

An exploit has been released as part of the MetaSploit Framework 2.0.

The following exploits are available:

/data/vulnerabilities/exploits/wbr.c
/data/vulnerabilities/exploits/rs_iis.c
/data/vulnerabilities/exploits/wd.pl
/data/vulnerabilities/exploits/webdavin-1.01.zip
/data/vulnerabilities/exploits/regexploit.c
/data/vulnerabilities/exploits/regexp.c
/data/vulnerabilities/exploits/regexploit.c
/data/vulnerabilities/exploits/KaHT_public.tar.gz
/data/vulnerabilities/exploits/webdav-reloaded.c
/data/vulnerabilities/exploits/linux-wb.c
/data/vulnerabilities/exploits/Xnuxer.c
/data/vulnerabilities/exploits/iis50_webdav_ntdll.pm

Solution / Fix

Microsoft Windows ntdll.dll Buffer Overflow Vulnerability

Solution:
Some reports indicate that the Microsoft patches for this issue may cause problems. It is not known if this is the result of the patches conflicting with certain configurations. Administrators are advised to apply workaround procedures if problems are experienced after applying the patch.

Microsoft has updated the bulletin with information regarding possible sources of conflicts with this patch. For precise details, see the Caveats section under Additional information about this patch in the Microsoft Security Bulletin.

Microsoft has revised its advisory to state that this vulnerability affects Windows NT systems. As Windows NT does not support WebDAV, exploits using WebDAV as the attack vector will not be effective against Windows NT systems.

Microsoft has released a new revision of the advisory which contains patches for Windows XP.

Microsoft has released fixes:

Microsoft Windows 2000 Terminal Services SP2