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Attack Tree Analysis for spf13/cobra

Objective: [G] Gain Unauthorized Control/Access

Attack Tree Visualization

[G] Gain Unauthorized Control/Access | ----------------------------------- | | [A] Exploit Cobra Command Structure [B] Exploit Cobra Flag Handling | ----------------------------------- ----------------------------------- | | [A1] Command Injection [B1] Flag Value (if exec.Command) Manipulation | ================= --------- | [A1a][!]Shell Metachar [B1a] Injecting -acters in Input Unexpected Values | [A1b] Path Traversal | ----------------------------------- | | [A3] Command Overriding [B3] Flag Default Bypass (PreRun/PersistentPreRun) | |

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[A3a] Overriding [B3a] Bypassing Security Checks Required Flag in Parent Commands Logic | | [A3b] Overriding [B3b] Exploiting Logic in PreRun Default Values

Attack Tree Path: [A] Exploit Cobra Command Structure

  • [A] Exploit Cobra Command Structure:

    • [A1] Command Injection (if exec.Command is used):

      • Description: This is the most critical vulnerability. If the Cobra application uses exec.Command (or similar) to execute external commands and incorporates unsanitized user input (from flags or arguments) into the command string, an attacker can inject shell metacharacters to execute arbitrary commands.

      • Likelihood: Medium to High (depending on coding practices).

      • Impact: Very High (complete system compromise).

      • Effort: Low to Medium.

      • Skill Level: Intermediate.

      • Detection Difficulty: Medium to Hard.

      • [A1a] [!] Shell Metacharacters in Input:

        • Description: The attacker provides input containing shell metacharacters (e.g., ;, |, &&, `, $()). This is the core of the command injection attack.
        • Likelihood: Medium.
        • Impact: Very High.
        • Effort: Low.
        • Skill Level: Intermediate.
        • Detection Difficulty: Medium.

      • [A1b] Path Traversal:

        • Description: If the command involves file paths, the attacker might attempt path traversal (e.g., ../../etc/passwd) to access restricted files. This is a specific type of command injection.
        • Likelihood: Low to Medium.
        • Impact: High.
        • Effort: Medium.
        • Skill Level: Intermediate.
        • Detection Difficulty: Medium.

    • [A3] Command Overriding (PreRun/PersistentPreRun):

      • Description: Exploiting vulnerabilities in PreRun or PersistentPreRun functions, which execute before the main command's Run function.

      • Likelihood: Low.

      • Impact: High.

      • Effort: Medium to High.

      • Skill Level: Intermediate to Advanced.

      • Detection Difficulty: Hard.

      • [A3a] Overriding Security Checks in Parent Commands:

        • Description: A vulnerable PersistentPreRun in a parent command can be exploited even if the subcommand is secure. This bypasses security checks intended for all subcommands.
        • Likelihood: Low.
        • Impact: High.
        • Effort: High.
        • Skill Level: Advanced.
        • Detection Difficulty: Very Hard.

      • [A3b] Overriding Logic in PreRun:

        • Description: A vulnerable PreRun in any command can be exploited, potentially altering the intended behavior of the command.
        • Likelihood: Low.
        • Impact: High.
        • Effort: Medium to High.
        • Skill Level: Intermediate to Advanced.
        • Detection Difficulty: Hard.

Attack Tree Path: [B] Exploit Cobra Flag Handling

  • [B] Exploit Cobra Flag Handling:

    • [B1] Flag Value Manipulation:

      • Description: Attackers provide unexpected or malicious values to flags, hoping to cause unintended behavior.

      • Likelihood: Medium to High (depends on input validation).

      • Impact: Low to High (depends on how the flag value is used).

      • Effort: Low.

      • Skill Level: Novice to Intermediate.

      • Detection Difficulty: Medium.

      • [B1a] Injecting Unexpected Values:

        • Description: Providing values outside the expected range, format, or type. This is a broad category encompassing many potential input validation failures.
        • Likelihood: Medium.
        • Impact: Low to Medium.
        • Effort: Low.
        • Skill Level: Novice.
        • Detection Difficulty: Medium.

    • [B3] Flag Default Bypass:

      • Description: Attackers try to bypass intended behavior by manipulating whether a flag is considered "set" or uses its default value.

      • Likelihood: Low to Medium.

      • Impact: Low to High.

      • Effort: Low to Medium.

      • Skill Level: Novice to Intermediate.

      • Detection Difficulty: Medium.

      • [B3a] Bypassing Required Flag Logic:

        • Description: Exploiting flaws in how the application checks if a required flag was provided, allowing the attacker to omit the flag.
        • Likelihood: Low.
        • Impact: Medium to High.
        • Effort: Low to Medium.
        • Skill Level: Novice to Intermediate.
        • Detection Difficulty: Medium.

      • [B3b] Exploiting Default Values:

        • Description: If the application relies on insecure default values, an attacker might try to prevent a flag from being set, forcing the use of the insecure default.
        • Likelihood: Low to Medium.
        • Impact: Low to High.
        • Effort: Low.
        • Skill Level: Novice.
        • Detection Difficulty: Medium.