Vulnerabilities > CVE-2011-1873 - Improper Input Validation vulnerability in Microsoft products
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 on 64-bit platforms does not properly validate pointers during the parsing of OpenType (aka OTF) fonts, which allows remote attackers to execute arbitrary code via a crafted font file, aka "Win32k OTF Validation Vulnerability."
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 10 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Msbulletin
| bulletin_id | MS11-041 |
| bulletin_url | |
| date | 2011-06-14T00:00:00 |
| impact | Remote Code Execution |
| knowledgebase_id | 2525694 |
| knowledgebase_url | |
| severity | Critical |
| title | Vulnerability in Windows Kernel-Mode Drivers Could Allow Remote Code Execution |
Nessus
| NASL family | Windows : Microsoft Bulletins |
| NASL id | SMB_NT_MS11-041.NASL |
| description | The remote host is running a version of the Windows kernel that is affected by a remote code execution vulnerability. An attacker can exploit this by causing a user to visit a network share containing a specially crafted OpenType font (OTF). The attacker can exploit this issue to execute arbitrary code in kernel mode and take complete control of the affected system. |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 55121 |
| published | 2011-06-15 |
| reporter | This script is Copyright (C) 2011-2018 Tenable Network Security, Inc. |
| source | https://www.tenable.com/plugins/nessus/55121 |
| title | MS11-041: Vulnerability in Windows Kernel-Mode Drivers Could Allow Remote Code Execution (2525694) |
| code | |
Oval
| accepted | 2014-03-03T04:00:36.581-05:00 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| class | vulnerability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| contributors |
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| definition_extensions |
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| description | win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 on 64-bit platforms does not properly validate pointers during the parsing of OpenType (aka OTF) fonts, which allows remote attackers to execute arbitrary code via a crafted font file, aka "Win32k OTF Validation Vulnerability." | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| family | windows | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| id | oval:org.mitre.oval:def:12725 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| status | accepted | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| submitted | 2011-06-14T13:00:00 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| title | Win32k OTF Validation Vulnerability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| version | 80 |
Seebug
| bulletinFamily | exploit |
| description | Bugtraq ID: 48183 CVE ID：CVE-2011-1873 Microsoft Windows是一款流行的操作系统。 在解析OpenType字体时win32k.sys存在指针验证错误，攻击者在远程WebDAV或SMB共享上构建特制OTF文件，诱使用户打开，可导致在X64或者基于Itanium的系统上以内核上下文执行任意代码。 Microsoft Windows XP Professional x64 Edition SP2 Microsoft Windows Vista x64 Edition SP2 Microsoft Windows Vista x64 Edition SP1 Microsoft Windows Server 2008 R2 x64 SP1 Microsoft Windows Server 2008 R2 Itanium SP1 Microsoft Windows Server 2008 R2 Itanium 0 Microsoft Windows Server 2008 for x64-based Systems SP2 Microsoft Windows Server 2008 for x64-based Systems R2 Microsoft Windows Server 2008 for x64-based Systems 0 Microsoft Windows Server 2008 for Itanium-based Systems SP2 Microsoft Windows Server 2008 for Itanium-based Systems 0 Microsoft Windows Server 2003 x64 SP2 Microsoft Windows Server 2003 Itanium SP2 Microsoft Windows 7 for x64-based Systems SP1 Microsoft Windows 7 for x64-based Systems 厂商解决方案 用户可参考如下供应商提供的安全公告获得补丁信息： http://www.microsoft.com/technet/security/Bulletin/MS11-041.mspx |
| id | SSV:20616 |
| last seen | 2017-11-19 |
| modified | 2011-06-16 |
| published | 2011-06-16 |
| reporter | Root |
| title | Microsoft Windows 'win32k.sys' OpenType字体解析远程代码执行漏洞 |
References
- http://www.securityfocus.com/bid/48183
- http://www.securitytracker.com/id?1025638
- http://secunia.com/advisories/44893
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67732
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12725
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-041