attack-tree.md

Attack Tree Analysis for symfony/console

Objective: Gain unauthorized access/disrupt application via Symfony Console

Attack Tree Visualization

Goal: Gain unauthorized access/disrupt application via Symfony Console ├── 1. Exploit Vulnerabilities in Custom Console Commands [HIGH RISK] │ ├── 1.1. Command Injection [HIGH RISK] │ │ ├── 1.1.1. Unsanitized User Input in Arguments [HIGH RISK] │ │ │ ├── 1.1.1.1. Craft malicious input passed as argument to trigger OS command execution. [CRITICAL] │ │ │ └── 1.1.1.2. Bypass weak input validation using shell metacharacters or encoding tricks. [CRITICAL] │ │ ├── 1.1.2. Unsanitized User Input in Options [HIGH RISK] │ │ │ ├── 1.1.2.1. Craft malicious input passed as option to trigger OS command execution. [CRITICAL] │ │ │ └── 1.1.2.2. Bypass weak input validation using shell metacharacters or encoding tricks. [CRITICAL] │ │ └── 1.1.3. Use of Process component with unsanitized input. [HIGH RISK] │ │ ├── 1.1.3.1. Directly pass user-supplied data to Process constructor or setCommandLine. [CRITICAL] │ │ └── 1.1.3.2. Fail to use Process::escapeArgument() or equivalent escaping mechanisms. [CRITICAL] │ ├── 1.2. Insecure Deserialization │ │ ├── 1.2.1. Command accepts serialized data as input (argument or option). │ │ │ ├── 1.2.1.1. Craft a malicious serialized object to trigger arbitrary code execution upon deserialization. [CRITICAL] │ ├── 1.3. Path Traversal │ │ ├── 1.3.1. Command reads/writes files based on user-supplied paths. │ │ │ ├── 1.3.1.1. Use "../" sequences to access files outside the intended directory. [CRITICAL] ├── 2. Exploit Misconfigurations of the Console Application [HIGH RISK] │ ├── 2.1. Overly Permissive Command Registration │ │ ├── 2.1.1. Registering commands that should be internal or restricted. │ │ │ ├── 2.1.1.1. Execute sensitive commands directly. [CRITICAL] │ ├── 2.3. Running Console with Excessive Privileges [HIGH RISK] │ │ └── 2.3.1. Executing the console application as root or a highly privileged user. │ │ └── 2.3.1.1. If a command is compromised, the attacker gains those elevated privileges. [CRITICAL] │ └── 2.4. Exposed Console Endpoint [HIGH RISK] │ └── 2.4.1. Console accessible from untrusted networks. │ └── 2.4.1.1. Directly invoke commands from a remote machine. [CRITICAL] └── 3. Exploit Vulnerabilities in Symfony Console Itself (Less Likely, but Possible) ├── 3.1. Zero-Day Vulnerability in Symfony Console Code └── 3.1.1. Exploit a previously unknown vulnerability in the core Symfony Console component. [CRITICAL]

Attack Tree Path: 1. Exploit Vulnerabilities in Custom Console Commands

Description: The attacker injects malicious OS commands into the application through unsanitized input to console commands.

Attack Tree Path: 1.1. Command Injection

Description: The attacker injects malicious OS commands into the application through unsanitized input to console commands.

Attack Tree Path: 1.1.1. Unsanitized User Input in Arguments

1.1.1.1. Craft malicious input...:* The attacker provides a specially crafted string as a command argument that, when processed by the application, executes arbitrary OS commands. Example: php bin/console mycommand "some_arg; rm -rf /" 1.1.1.2. Bypass weak input validation...: The attacker uses techniques like shell metacharacters (;, |, &&, `), or encoding tricks (URL encoding, base64) to circumvent input filters.

Attack Tree Path: 1.1.2. Unsanitized User Input in Options

1.1.2.1. Craft malicious input...: Similar to 1.1.1.1, but the malicious input is provided as a command option. Example: php bin/console mycommand --option="some_value; whoami" 1.1.2.2. Bypass weak input validation...: Same techniques as 1.1.1.2.

Attack Tree Path: 1.1.3. Use of Process component with unsanitized input

1.1.3.1. Directly pass user-supplied data...: The developer directly concatenates user input with OS commands when using the Process component, creating a vulnerability. 1.1.3.2. Fail to use Process::escapeArgument()...: The developer uses the Process component but forgets to properly escape user-provided arguments, leading to command injection.

Attack Tree Path: 1.2. Insecure Deserialization

Description: The attacker provides a malicious serialized object as input, which, when deserialized by the application, triggers arbitrary code execution.

Attack Tree Path: 1.2.1. Command accepts serialized data as input...

1.2.1.1. Craft a malicious serialized object...: The attacker creates a serialized object containing a "gadget chain" – a sequence of method calls that ultimately lead to code execution. This requires knowledge of the application's codebase and available classes.

Attack Tree Path: 1.3. Path Traversal

Description: The attacker manipulates file paths provided as input to access files outside the intended directory.

Attack Tree Path: 1.3.1. Command reads/writes files based on user-supplied paths.

1.3.1.1. Use "../" sequences...: The attacker uses ../ sequences in the file path to navigate up the directory structure and access files outside the allowed directory. Example: php bin/console mycommand --file="../../../etc/passwd"

Attack Tree Path: 2. Exploit Misconfigurations of the Console Application

Description: Exploit Misconfigurations of the Console Application

Attack Tree Path: 2.1. Overly Permissive Command Registration

Description: Sensitive commands are registered and accessible to users who should not have access to them.

Attack Tree Path: 2.1.1. Registering commands that should be internal...

2.1.1.1. Execute sensitive commands directly.: The attacker, having gained access to the console, directly executes commands that perform sensitive operations (e.g., database modifications, user management).

Attack Tree Path: 2.3. Running Console with Excessive Privileges

Description: The console application is executed with higher privileges than necessary (e.g., as root).

Attack Tree Path: 2.3.1. Executing the console application as root...

2.3.1.1. If a command is compromised...: If any command is successfully exploited (e.g., through command injection), the attacker gains the elevated privileges of the user running the console (root in this case).

Attack Tree Path: 2.4. Exposed Console Endpoint

Description: The console application is accessible from untrusted networks, allowing remote attackers to interact with it.

Attack Tree Path: 2.4.1. Console accessible from untrusted networks.

2.4.1.1. Directly invoke commands from a remote machine.: The attacker can directly send commands to the console application over the network, potentially exploiting any vulnerabilities present.

Attack Tree Path: 3. Exploit Vulnerabilities in Symfony Console Itself

Description: Exploit Vulnerabilities in Symfony Console Itself

Attack Tree Path: 3.1. Zero-Day Vulnerability in Symfony Console Code

Description: A previously unknown vulnerability exists in the core Symfony Console component.

Attack Tree Path: 3.1.1. Exploit a previously unknown vulnerability...

The attacker discovers and exploits a vulnerability that has not yet been publicly disclosed or patched. This requires advanced skills in vulnerability research and exploit development.