‘Novell eDirectory Multiple Vulnerabilities (dhost.exe)’

Published on October 20th, 2008
Summary

‘Multiple vulnerabilities have been discovered in Novell’s eDirectory’s dhost.exe service, these vulnerabilities would allow an attacker to overflow internal buffers used by the product which can be then leveraged to cause the execution of arbitrary code.’

Credit:

‘The information has been provided by Zero Day Initiative (ZDI).
The original article can be found at: http://www.zerodayinitiative.com/advisories/ZDI-08-063, http://www.zerodayinitiative.com/advisories/ZDI-08-064, http://www.zerodayinitiative.com/advisories/ZDI-08-065 and http://www.zerodayinitiative.com/advisories/ZDI-08-066‘


Details

‘Novell eDirectory Core Protocol Opcode 0x24 Heap Overflow Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell eDirectory Server. Authentication is not required to exploit this vulnerability.

The specific flaw exists within dhost.exe, the service responsible for directory replication which is bound by default to TCP port 524. Improper parsing within opcode 0x24 via the Netware Core Protocol can result in an arithmetic calculation based on supplied user-input resulting in an under-allocated heap buffer. This fault can be leveraged to result in arbitrary code execution.

CVE Information:
CVE-2008-4480

Vendor Response:
Novell has issued an update to correct this vulnerability. More details can be found at:
http://www.novell.com/support/php/search.do?cmd=displayKC&docType=kc&externalId=7001183&sliceId=1&docTypeID=DT_TID_1_1&dialogID=78066829&stateId=0%200%2078062953

Novell eDirectory Core Protocol Opcode 0x0F Heap Overflow Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Novell eDirectory Server. Authentication is not required to exploit this vulnerability.

The specific flaw exists within dhost.exe, the service responsible for directory replication which is bound by default to TCP port 524. Improper parsing within opcode 0x0F via the Netware Core Protocol can result in an arithmetic calculation based on supplied user-input resulting in an integer overflow that will be used to copy into a heap buffer. This fault can be leveraged to result in arbitrary code execution.

CVE Information:
CVE-2008-4478

Vendor Response:
Novell has issued an update to correct this vulnerability. More details can be found at:
http://www.novell.com/support/php/search.do?cmd=displayKC&docType=kc&externalId=7001184&sliceId=1&docTypeID=DT_TID_1_1&dialogID=78066829&stateId=0%200%2078062953

Novell eDirectory dhost.exe Accept Language Header Heap Overflow Vulnerability
This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Novell eDirectory. Authentication is not required to exploit this vulnerability.

The specific flaw resides in the web console running on TCP ports 8028 and 8030. The server exposes a web interface and accepts SOAP connections. The service copies the contents of the Accept-Language header within a SOAP request into a fixed-length buffer without any bounds checking. If an attacker sends a specially crafted request it will trigger an overflow during a memory copy operation leading to arbitrary code execution under the context of the SYSTEM user.

CVE Information:
CVE-2008-4479

Vendor Response:
Novell has issued an update to correct this vulnerability. More details can be found at:
http://www.novell.com/support/php/search.do?cmd=displayKC&docType=kc&externalId=7000086&sliceId=1&docTypeID=DT_TID_1_1&dialogID=78066829&stateId=0%200%2078062953

Novell eDirectory dhost.exe Content-Length Header Heap Overflow Vulnerability
This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Novell eDirectory. Authentication is not required to exploit this vulnerability.

The specific flaw resides in the web console running on TCP ports 8028 and 8030. The server exposes a web interface and accepts SOAP connections. While parsing the Content-Length header within a SOAP request an integer overflow can occur. This integer overflow triggers a subsequent overflow during a memory copy operation leading to arbitrary code execution under the context of the SYSTEM user.

CVE Information:
CVE-2008-4478

Vendor Response:
Novell has issued an update to correct this vulnerability. More details can be found at:
http://www.novell.com/support/php/search.do?cmd=displayKC&docType=kc&externalId=7000087&sliceId=1&docTypeID=DT_TID_1_1&dialogID=78066829&stateId=0%200%2078062953‘

Categories: Windows
Tags:

Related Posts

Windows

Microsoft Office Use After Free Memory Corruption Vulnerabilities

Use-after-free vulnerability in Microsoft Office 2010 SP2, Office 2013 Gold and SP1, Office 2013 RT Gold and SP1, Office for Mac 2011, Word Viewer, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2 and 2013 Gold and SP1, and Office Web Apps 2010 SP2 and 2013 Gold and SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka 'Use After Free Word Remote Code Execution Vulnerability.'

Windows

Microsoft Windows Local Privilege Escalation Vulnerabilities

The AhcVerifyAdminContext function in ahcache.sys in the Application Compatibility component in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not verify that an impersonation token is associated with an administrative account, which allows local users to gain privileges by running AppCompatCache.exe with a crafted DLL file, aka MSRC ID 20544 or 'Microsoft Application Compatibility Infrastructure Elevation of Privilege Vulnerability.'

Windows

Microsoft Internet Explorer Cross-Domain Information Disclosure Vulnerabilities

Microsoft Internet Explorer 9 and 10 allows remote attackers to read content from a different (1) domain or (2) zone via a crafted web site, aka 'Internet Explorer Cross-domain Information Disclosure Vulnerability.'