Vulnerabilities > CVE-2012-2521 - Code Injection vulnerability in Microsoft Internet Explorer
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "Asynchronous NULL Object Access Remote Code Execution Vulnerability."
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 4 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Manipulating User-Controlled Variables This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.
Msbulletin
| bulletin_id | MS12-052 |
| bulletin_url | |
| date | 2012-08-14T00:00:00 |
| impact | Remote Code Execution |
| knowledgebase_id | 2722913 |
| knowledgebase_url | |
| severity | Critical |
| title | Cumulative Security Update for Internet Explorer |
Nessus
| NASL family | Windows : Microsoft Bulletins |
| NASL id | SMB_NT_MS12-052.NASL |
| description | The remote host is missing Internet Explorer (IE) Security Update 2722913. The installed version of IE is affected by vulnerabilities that could allow an attacker to execute arbitrary code on the remote host. |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 61527 |
| published | 2012-08-15 |
| reporter | This script is Copyright (C) 2012-2018 Tenable Network Security, Inc. |
| source | https://www.tenable.com/plugins/nessus/61527 |
| title | MS12-052: Cumulative Security Update for Internet Explorer (2722913) |
| code | |
Oval
| accepted | 2014-08-18T04:01:23.810-04:00 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| class | vulnerability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| definition_extensions |
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| description | Microsoft Internet Explorer 6 through 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "Asynchronous NULL Object Access Remote Code Execution Vulnerability." | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| family | windows | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| id | oval:org.mitre.oval:def:15742 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| status | accepted | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| submitted | 2012-08-20T11:14:26 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| title | Asynchronous null object access remote code execution vulnerability - MS12-052 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| version | 76 |
Seebug
| bulletinFamily | exploit |
| description | Bugtraq ID:54952 CVE ID:CVE-2012-2521 Microsoft Internet Explorer是一款流行的WEB浏览器。 Microsoft Internet Explorer没有正确处理内存中的对象，当异步访问NULL对象时可触发一个释放后使用错误，攻击者通过引用已删除对象可以应用程序上下文执行任意代码。 0 Microsoft Internet Explorer 9 Microsoft Internet Explorer 8 Microsoft Internet Explorer 7 Microsoft Internet Explorer 6.0 SP3 Microsoft Internet Explorer 6.0 SP2 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://technet.microsoft.com/en-us/security/bulletin/MS12-052 |
| id | SSV:60325 |
| last seen | 2017-11-19 |
| modified | 2012-08-18 |
| published | 2012-08-18 |
| reporter | Root |
| title | Microsoft Internet Explorer 远程代码执行漏洞(CVE-2012-2521) |