Microsoft Office hlink.dll COM object buffer overflow
| excel-hlink-bo (27224) |  High Risk |
Description:
Microsoft Word, PowerPoint, and Excel are vulnerable to a stack-based buffer overflow, caused by improper bounds checking of hyperlinks by the hlink.dll library. By creating a malicious Office document containing a specially-crafted hyperlink, a remote attacker could overflow a buffer and execute arbitrary code on the system if the attacker could persuade a potential victim to open the malicious document and click the specially-crafted link.
*CVSS:
| Base Score: | 5.6 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 4.4 |
| Exploitability: | Proof-Of-Concept |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS06-050. See References.
References:
- Full-disclosure Mailing List, Sat Jun 18 2005 - 15:50:59 CDT: ***ULTRALAME*** Microsoft Excel Unicode Overflow ***ULTRALAME***.
- Microsoft Security Bulletin MS06-050: Vulnerability in Microsoft Windows Hyperlink Object Library Could Allow Remote Code Execution (920670).
- Microsoft Security Response Center Blog Tuesday, June 20, 2006 11:17: Information on Proof of Concept posting about hlink.dll.
- TSRT-06-10: Microsoft HLINK.DLL Hyperlink Object Library Buffer Overflow Vulnerability.
- US-CERT Technical Cyber Security Alert TA06-220A: Microsoft Windows, Office, and Internet Explorer Vulnerabilities.
- ASA-2006-154: Windows Security Updates for August 2006 - (MS06-040 - MS06-051)
- BID-18500: Microsoft HLINK.DLL Link Memory Corruption Vulnerability
- CVE-2006-3086: Stack-based buffer overflow in the HrShellOpenWithMonikerDisplayName function in Microsoft Hyperlink Object Library (hlink.dll) allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long hyperlink, as demonstrated using an Excel worksheet with a long link in Unicode, aka Hyperlink COM Object Buffer Overflow Vulnerability. NOTE: this is a different issue than CVE-2006-3059.
- OSVDB ID: 26666: Microsoft Hyperlink Object Library hlink.dll Link Processing Overflow
- SA20748: Microsoft Windows Hyperlink Object Library Vulnerabilities
- SECTRACK ID: 1016339: Microsoft Windows `hlink.dll` Buffer Overflow in Processing Hyperlinks Lets Remote Users Execute Arbitrary Code
- US-CERT VU#394444: Microsoft Hyperlink Object Library stack buffer overflow
- VUPEN/ADV-2006-2431: Microsoft Windows Hyperlink Library Multiple Buffer Overflow Vulnerabilities (MS06-050)
Platforms Affected:
- Microsoft Excel 2000
- Microsoft Excel 2002
- Microsoft Excel 2003
- Microsoft Excel Viewer 2003
Reported:
Jun 18, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.