BID:13300

Microsoft Windows ASN.1 Library Bit String Processing Variant Heap Corruption Vulnerability

Info

Microsoft Windows ASN.1 Library Bit String Processing Variant Heap Corruption Vulnerability

Bugtraq ID:	13300
Class:	Boundary Condition Error
CVE:	CVE-2003-0818
Remote:	Yes
Local:	No
Published:	Apr 21 2005 12:00AM
Updated:	Jul 12 2009 02:06PM
Credit:	Discovery of this vulnerability has been credited to Solar Eclipse.
Vulnerable:	Yahoo! Messenger 5.6 .0.1358 Yahoo! Messenger 5.6 .0.1356 Yahoo! Messenger 5.6 .0.1355 Yahoo! Messenger 5.6 .0.1351 Yahoo! Messenger 5.6 .0.1347 Yahoo! Messenger 5.6 Yahoo! Messenger 5.5 .1249 Yahoo! Messenger 5.5 VanDyke SecureCRT 4.0.5 VanDyke SecureCRT 4.0.4 VanDyke SecureCRT 4.0.3 VanDyke SecureCRT 4.0.2 VanDyke SecureCRT 4.0.1 Musicmatch Inc. Musicmatch Jukebox 8.2 Musicmatch Inc. Musicmatch Jukebox 8.1 Musicmatch Inc. Musicmatch Jukebox 8.0 Microsoft Windows XP Professional SP1 Microsoft Windows XP Professional Microsoft Windows XP Home SP1 Microsoft Windows XP Home Microsoft Windows XP 64-bit Edition Version 2003 SP1 Microsoft Windows XP 64-bit Edition Version 2003 Microsoft Windows XP 64-bit Edition SP1 Microsoft Windows XP 64-bit Edition Microsoft Windows Server 2003 Web Edition Microsoft Windows Server 2003 Standard Edition Microsoft Windows Server 2003 Enterprise Edition Itanium 0 Microsoft Windows Server 2003 Enterprise Edition Microsoft Windows Server 2003 Datacenter Edition Itanium 0 Microsoft Windows Server 2003 Datacenter 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 98SE Microsoft Windows 98 Microsoft Windows 2000 Server SP4 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 SP4 Microsoft Windows 2000 Professional SP3 Microsoft Windows 2000 Professional SP2 Microsoft Windows 2000 Professional SP1 Microsoft Windows 2000 Professional Microsoft Windows 2000 Advanced Server SP4 Microsoft Windows 2000 Advanced Server SP3 Microsoft Windows 2000 Advanced Server SP2 Microsoft Windows 2000 Advanced Server SP1 Microsoft Windows 2000 Advanced Server JASC Software PaintShop Pro 8.10 JASC Software PaintShop Pro 8.0 1 JASC Software PaintShop Pro 8.0 0 JASC Software PaintShop Pro 7.0 4 JASC Software PaintShop Pro 7.0 2 JASC Software PaintShop Pro 7.0 1 JASC Software PaintShop Pro 7.0 JASC Software PaintShop Pro 6.0 2 JASC Software PaintShop Pro 6.0 1 JASC Software PaintShop Pro 6.0 JASC Software PaintShop Pro 5.0 3 JASC Software PaintShop Pro 5.0 1 JASC Software PaintShop Pro 5.0 Intuit TurboTax 2003 Intuit Quicken 2003 AOL Instant Messenger 5.5.3415 Beta AOL Instant Messenger 5.2.3292 AOL Instant Messenger 5.1.3036 AOL Instant Messenger 5.0.2938 Altova xmlspy Professional Edition 2004 R2 Altova xmlspy Professional Edition 2004 Altova xmlspy Home Edition 2004 R2 Altova xmlspy Home Edition 2004 Altova xmlspy Enterprise Edition 2004 R2 Altova xmlspy Enterprise Edition 2004 Adobe Acrobat 6.0 Adobe Acrobat 5.0.5 Adobe Acrobat 5.0

Not Vulnerable:

Discussion

Microsoft Windows ASN.1 Library Bit String Processing Variant Heap Corruption Vulnerability

Microsoft ASN.1 handling library has been reported prone to a heap corruption vulnerability. The issue presents itself in the ASN.1 bit string decoding routines, specifically the BERDecBitString() function. The issue manifests when the affected function attempts to process a constructed bit string that contain another nested constructed bit string.

This vulnerability is exposed in a number of security related operating system components, including Kerberos (via UDP port 88), Microsoft IIS with SSL support enabled and NTLMv2 authentication (via TCP ports 135, 139 and 445). Other components may also be affected, though a comprehensive list is not available at this time. Client applications, which use the library, will be affected, including LSASS.EXE and CRYPT32.DLL (and any application that relies on CRYPT32.DLL). The vulnerable library is used frequently in components that handle certificates such as Internet Explorer and Outlook. Handling of signed ActiveX components could also present an exposure.

It should be noted that because ASN.1 data will likely be encoded, for example Kerberos, SSL, IPSec or Base64 encoded, the malicious integer values may be obfuscated and as a result not easily detectable.

Issues related to this vulnerability were originally covered in BID 9626 and 9743, further information has been made available which identifies that this is a distinct vulnerability in the library and so this specific issue has been assigned an individual BID.

** June 5, 2005 Update: An IRC bot style tool may be exploiting this vulnerability. This alert will be updated as further information becomes available.

Exploit / POC

Microsoft Windows ASN.1 Library Bit String Processing Variant Heap Corruption Vulnerability

The following proof of concept exploits are available:

/data/vulnerabilities/exploits/MS04-007-dos.c
/data/vulnerabilities/exploits/kill-bill.tar.gz
/data/vulnerabilities/exploits/msasn1_ms04_007_killbill.pm

Solution / Fix

Microsoft Windows ASN.1 Library Bit String Processing Variant Heap Corruption Vulnerability

Solution:
It is reported that computers that have the patches associated with Microsoft security bulletin MS04-007 installed are not vulnerable to this issue. Symantec has confirmed this information.

Microsoft Windows 2000 Server SP2