BID:8458

Microsoft RPCSS DCERPC DCOM Object Activation Packet Length Heap Corruption Vulnerability

Info

Microsoft RPCSS DCERPC DCOM Object Activation Packet Length Heap Corruption Vulnerability

Bugtraq ID:	8458
Class:	Boundary Condition Error
CVE:	CVE-2003-0715
Remote:	Yes
Local:	No
Published:	Sep 10 2003 12:00AM
Updated:	Jul 11 2009 11:56PM
Credit:	Discovery of this issue is credited to eEye Digital Security, NSFOCUS Security Team, Xue Yong Zhi and Renaud Deraison.
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 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 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 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 Datacenter Server SP4 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 SP4 Microsoft Windows 2000 Advanced Server SP3 Microsoft Windows 2000 Advanced Server SP2 Microsoft Windows 2000 Advanced Server SP1 Microsoft Windows 2000 Advanced Server

Not Vulnerable:

Discussion

Microsoft RPCSS DCERPC DCOM Object Activation Packet Length Heap Corruption Vulnerability

A remotely exploitable heap corruption vulnerability has been discovered in RPC. This issue exists in the RPCSS Service and occurs due to insufficient sanity checks when handling length values located within DCERPC DCOM object activation packets. As a result, this vulnerability can be exploited by a remote attacker to manipulate the contents of heap memory, potentially allowing for the execution flow of the RPCSS service to be controlled. This would utlitimately allow for the execution of arbitrary code with SYSTEM privileges.

eEye released an advisory disclosing details about the issue they reported that was addressed in MS03-039. It is currently not known if this information is associated with CAN-2003-0528. The other buffer overrun reported in MS03-039 and described in BID 8459 may be applicable to CAN-2003-0528. The appropriate updates will be made when further CVE information becomes available.

Exploit / POC

Microsoft RPCSS DCERPC DCOM Object Activation Packet Length Heap Corruption 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.

It should be noted that eEye has developed an exploit for this issue, however it has not been made publicly available.

Further analysis of the exploit previously available here, has concluded that it is actually for the long filename heap overflow described in BID 8459.

** UPDATE: Exploit activity for this vulnerability has been observed by a Symantec DeepSight honeypot.

/data/vulnerabilities/exploits/MS-DCOM-Uni.c
/data/vulnerabilities/exploits/MS-DCOM-Uni.asm
/data/vulnerabilities/exploits/MS-DCOM-Uni.asm

Solution / Fix

Microsoft RPCSS DCERPC DCOM Object Activation Packet Length Heap Corruption Vulnerability

Solution:
Microsoft has released updates to address this issue.

Working exploit code is currently circulating in the wild. Administrators are strongly urged to apply the available patches and workarounds at the earliest possible convenience.

Microsoft Windows 2000 Server SP2