Microsoft Word 2003 RTF Document code injection

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

A vulnerability classified as critical was found in Microsoft Word 2003 (Word Processing Software). This vulnerability affects an unknown code of the component RTF Document Handler. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Unspecified vulnerability in Microsoft Word in Office 2000 and XP SP3, 2003 SP2 and SP3, and 2007 Office System SP1 and earlier allows remote attackers to execute arbitrary code via a Rich Text Format (.rtf) file with a malformed string that triggers a "memory calculation error" and a heap-based buffer overflow, aka "Object Parsing Vulnerability."

The weakness was published 05/13/2008 by team509 with ZDI as MS08-026 as confirmed bulletin (Technet). The advisory is shared for download at microsoft.com. The public release has been coordinated with the vendor. This vulnerability was named CVE-2008-1091 since 02/28/2008. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a private exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 32310 (MS08-026: Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (951207)), 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 110080 (Microsoft Word Remote Code Execution Vulnerability (MS08-026)).

Upgrading eliminates this vulnerability. Applying the patch MS08-026 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (32310). Similar entries are available at 3701 and 42326.

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

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
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Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

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Nessus ID: 32310
Nessus Name: MS08-026: Vulnerabilities in Microsoft Word Could Allow Remote Code Execution (951207)
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Countermeasuresinfo

Recommended: Upgrade
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Patch: MS08-026

Timelineinfo

02/28/2008 🔍
05/13/2008 +75 days 🔍
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05/20/2008 +6 days 🔍
04/26/2019 +3993 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS08-026
Researcher: team509
Organization: ZDI
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2008-1091 (🔍)
OVAL: 🔍

SecurityTracker: 1020013
SecurityFocus: 29104 - Microsoft Word RTF Malformed String Handling Memory Corruption Remote Code Execution Vulnerability
Secunia: 30143 - Microsoft Word Two Code Execution Vulnerabilities, Highly Critical
OSVDB: 45031 - Microsoft Office RTF File Handling Object Parsing Arbitrary Code Execution
Vupen: ADV-2008-1504

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Entryinfo

Created: 05/20/2008 09:43
Updated: 04/26/2019 21:47
Changes: 05/20/2008 09:43 (86), 04/26/2019 21:47 (4)
Complete: 🔍

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