Microsoft Excel up to 2003 Hyperlink hlink.dll Long Hyperlink memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Microsoft Excel up to 2003. This issue affects some unknown processing in the library hlink.dll of the component Hyperlink Handler. Performing a manipulation as part of Long Hyperlink results in memory corruption. This vulnerability is known as CVE-2006-3086. Furthermore, an exploit is available. It is suggested to swap out the affected component for an alternative.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Excel up to 2003 (Spreadsheet Software). This affects an unknown functionality in the library hlink.dll of the component Hyperlink Handler. The manipulation as part of a Long Hyperlink leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published 06/20/2006 by Pedram Amini (kcope) with TippingPoint Security Research Team as confirmed posting (Bugtraq). The advisory is shared at securityfocus.com. This vulnerability is uniquely identified as CVE-2006-3086 since 06/19/2006. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

After before and not just, there has been an exploit disclosed. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 22192 (MS06-050: Vulnerabilities in Microsoft Windows Hyperlink Object Library Could Allow Remote Code Execution (920670)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90338 (Microsoft Windows Hyperlink Object Library Remote Code Execution Vulnerabilities (MS06-050)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at windowsupdate.microsoft.com. The problem might be mitigated by replacing the product with as an alternative. The best possible mitigation is suggested to be establishing an alternative product. A possible mitigation has been published 3 years after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 4504.

The vulnerability is also documented in the databases at X-Force (27224), Exploit-DB (1927), Tenable (22192), SecurityFocus (BID 18500†) and OSVDB (26666†). Similar entry is available at VDB-31691. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 22192
Nessus Name: MS06-050: Vulnerabilities in Microsoft Windows Hyperlink Object Library Could Allow Remote Code Execution (920670)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Saint ID: exploit_info/excel_url_unicode
Saint Name: Microsoft Excel URL unicode buffer overflow

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Alternative
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: windowsupdate.microsoft.com
TippingPoint: 🔍

McAfee IPS: 🔍
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SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
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Timelineinfo

06/18/2006 🔍
06/19/2006 +1 days 🔍
06/19/2006 +0 days 🔍
06/19/2006 +0 days 🔍
06/19/2006 +0 days 🔍
06/20/2006 +1 days 🔍
06/20/2006 +0 days 🔍
06/20/2006 +0 days 🔍
06/20/2006 +0 days 🔍
06/25/2006 +4 days 🔍
06/26/2006 +1 days 🔍
08/08/2006 +43 days 🔍
08/08/2008 +731 days 🔍
01/20/2025 +6009 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: securityfocus.com⛔
Researcher: Pedram Amini (kcope)
Organization: TippingPoint Security Research Team
Status: Confirmed

CVE: CVE-2006-3086 (🔍)
GCVE (CVE): GCVE-0-2006-3086
GCVE (VulDB): GCVE-100-2325

OVAL: 🔍

CERT: 🔍
X-Force: 27224 - Microsoft Office hlink.dll COM object buffer overflow, High Risk
SecurityFocus: 18500 - Microsoft HLINK.DLL Link Memory Corruption Vulnerability
Secunia: 20748 - Microsoft Windows Hyperlink Object Library Vulnerabilities, Highly Critical
OSVDB: 26666 - Microsoft Hyperlink Object Library hlink.dll Link Processing Overflow
SecurityTracker: 1016339
Vulnerability Center: 11998 - [MS06-050] Microsoft Hyperlink Object Library DoS and Code Execution due to a Buffer Overflow, Critical
Vupen: ADV-2006-2431

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/26/2006 16:27
Updated: 01/20/2025 22:47
Changes: 06/26/2006 16:27 (106), 06/21/2019 09:20 (12), 07/03/2024 11:15 (17), 01/20/2025 22:47 (1)
Complete: 🔍
Cache ID: 216:DEE:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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