Vulnerabilities > CVE-2009-2852 - Improper Input Validation vulnerability in Ryan.Mcgeary Wp-Syntax
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
WP-Syntax plugin 0.9.1 and earlier for Wordpress, with register_globals enabled, allows remote attackers to execute arbitrary PHP code via the test_filter[wp_head] array parameter to test/index.php, which is used in a call to the call_user_func_array function.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 | |
| Application | 1 |
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.
Exploit-Db
| description | Wordpress Plugin WP-Syntax <= 0.9.1 Remote Command Execution. CVE-2009-2852. Webapps exploit for php platform |
| file | exploits/php/webapps/9431.txt |
| id | EDB-ID:9431 |
| last seen | 2016-02-01 |
| modified | 2009-08-27 |
| platform | php |
| port | |
| published | 2009-08-27 |
| reporter | Raz0r |
| source | https://www.exploit-db.com/download/9431/ |
| title | WordPress Plugin WP-Syntax <= 0.9.1 - Remote Command Execution |
| type | webapps |
Nessus
| NASL family | CGI abuses |
| NASL id | WP_SYNTAX_CMD_EXEC.NASL |
| description | The installation of WordPress on the remote web server includes the WP-Syntax plugin, a third-party add-on that provides clean syntax highlighting supporting a wide range of programming languages. The version of WP-Syntax installed on the remote host fails to initialize the |
| last seen | 2020-06-01 |
| modified | 2020-06-02 |
| plugin id | 40592 |
| published | 2009-08-14 |
| reporter | This script is Copyright (C) 2009-2018 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/40592 |
| title | WP-Syntax Plugin for WordPress 'apply_filters' function Command Execution |
| code | |
Seebug
| bulletinFamily | exploit |
| description | BUGTRAQ ID: 36040 CVE(CAN) ID: CVE-2009-2852 WordPress是一款免费的论坛Blog系统。 WP-Syntax是wordpress使用的用于高亮显示代码的插件。该插件的wp-syntax/test/index.php模块没有正确地过滤对test_filter[]所传送的参数便在call_user_func_array()调用中使用： function apply_filters($tag, $string) { global $test_filter; if (!isset($test_filter[$tag])) return $string; uksort($test_filter[$tag], "strnatcasecmp"); foreach ($test_filter[$tag] as $priority => $functions) { if (is_null($functions)) continue; foreach($functions as $function) { $string = call_user_func_array($function, array($string)); } } return $string; } 这允许远程攻击者通过提交恶意GET请求注入并执行PHP代码。成功攻击要求打开了register_globals。 WordPress WP-Syntax <= 0.9.1 厂商补丁： WordPress --------- 目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： http://wordpress.org/development/2009/08/2-8-4-security-release/ |
| id | SSV:12148 |
| last seen | 2017-11-19 |
| modified | 2009-08-28 |
| published | 2009-08-28 |
| reporter | Root |
| source | https://www.seebug.org/vuldb/ssvid-12148 |
| title | WordPress WP-Syntax插件远程PHP代码执行漏洞 |