Skip to content

Latest commit

 

History

History
118 lines (99 loc) · 9.88 KB

threat-modeling.md

File metadata and controls

118 lines (99 loc) · 9.88 KB

Threat Model Analysis for docusealco/docuseal

Threat: User Impersonation within Docuseal

  • Threat: User Impersonation within Docuseal
  • Description: An attacker gains unauthorized access to a legitimate user's Docuseal account, typically through credential theft (phishing, password cracking, credential stuffing) or session hijacking. Once impersonated, the attacker can access, modify, or sign documents as that user.
  • Impact: Unauthorized access to sensitive documents, unauthorized signing of documents on behalf of the impersonated user, data breaches, and potential legal ramifications.
  • Docuseal Component Affected: User Authentication Module, Session Management, Access Control Module
  • Risk Severity: High
  • Mitigation Strategies:
    • Enforce strong password policies (complexity, length, rotation).
    • Implement Multi-Factor Authentication (MFA) for all users.
    • Secure session management practices (secure cookies, session timeouts).
    • Regularly monitor for suspicious login activity and implement account lockout policies.

Threat: Document Tampering Post-Signing

  • Threat: Document Tampering Post-Signing
  • Description: After a document is signed within Docuseal, an attacker attempts to modify the document content or signature to invalidate the agreement or alter its terms. This could involve exploiting vulnerabilities in document storage, signature verification, or access control mechanisms.
  • Impact: Loss of document integrity, invalidation of signed agreements, legal disputes, and potential financial losses.
  • Docuseal Component Affected: Document Storage, Digital Signature Module, Signature Verification Module
  • Risk Severity: Critical
  • Mitigation Strategies:
    • Employ robust digital signature technology with strong cryptographic algorithms for document signing.
    • Implement secure document storage with integrity checks to detect unauthorized modifications.
    • Ensure strong signature verification processes are in place to detect tampering.
    • Utilize timestamping services to provide proof of document signing time and further enhance non-repudiation.

Threat: Signature Forgery or Manipulation

  • Threat: Signature Forgery or Manipulation
  • Description: An attacker attempts to forge a digital signature or manipulate an existing signature within Docuseal to sign documents without authorization or to invalidate legitimate signatures. This could involve exploiting weaknesses in the signature generation or verification process, or compromising cryptographic keys.
  • Impact: Acceptance of fraudulently signed documents, invalidation of legitimate agreements, legal disputes, and significant financial or reputational damage.
  • Docuseal Component Affected: Digital Signature Module, Signature Generation, Signature Verification, Key Management
  • Risk Severity: Critical
  • Mitigation Strategies:
    • Use strong and well-vetted cryptographic libraries for signature generation and verification.
    • Implement secure key management practices, including secure key generation, storage, and access control.
    • Regularly audit and test the signature generation and verification processes for vulnerabilities.
    • Consider using Hardware Security Modules (HSMs) for key storage and cryptographic operations for enhanced security.

Threat: Document Content Manipulation Before Signing

  • Threat: Document Content Manipulation Before Signing
  • Description: An attacker with unauthorized access or through exploiting access control vulnerabilities modifies the content of a document before it is presented to the intended signer. This could involve altering terms, clauses, or critical information within the document without the signer's awareness.
  • Impact: Signers may unknowingly agree to altered terms, leading to legal disputes, financial losses, and compromised agreements.
  • Docuseal Component Affected: Document Access Control Module, Document Editing Module, Workflow Management
  • Risk Severity: High
  • Mitigation Strategies:
    • Implement granular role-based access control (RBAC) to restrict document editing to authorized users only.
    • Maintain audit logs of all document modifications and access attempts.
    • Implement version control for documents to track changes and revert to previous versions if necessary.
    • Clearly display document version history and modification logs to signers before signing.

Threat: Lack of Non-Repudiation for Signatures

  • Threat: Lack of Non-Repudiation for Signatures
  • Description: Docuseal's signature implementation is weak or lacks essential features (e.g., timestamping, secure key management), making it possible for a signer to plausibly deny having signed a document.
  • Impact: Legal disputes, difficulty in enforcing signed agreements, and undermined trust in the document signing process.
  • Docuseal Component Affected: Digital Signature Module, Signature Generation, Timestamping Module
  • Risk Severity: High
  • Mitigation Strategies:
    • Utilize digital signatures that comply with relevant legal and industry standards for non-repudiation.
    • Implement timestamping to provide cryptographic proof of signing time.
    • Ensure secure key management practices to link signatures definitively to signers.
    • Clearly communicate the non-repudiation properties of Docuseal's signatures to users.

Threat: Unauthorized Document Access

  • Threat: Unauthorized Document Access
  • Description: Weak access control mechanisms in Docuseal allow unauthorized users to view documents they should not have access to. This could be due to misconfigured permissions, vulnerabilities in access control logic, or privilege escalation.
  • Impact: Disclosure of confidential or sensitive information, privacy violations, and potential misuse of accessed data.
  • Docuseal Component Affected: Access Control Module, User Authentication Module, Document Management Module
  • Risk Severity: High
  • Mitigation Strategies:
    • Implement robust role-based access control (RBAC) or attribute-based access control (ABAC) to enforce least privilege access.
    • Regularly review and audit access control configurations to ensure they are correctly implemented and maintained.
    • Conduct penetration testing to identify and remediate access control vulnerabilities.

Threat: Insecure Document Storage

  • Threat: Insecure Document Storage
  • Description: Docuseal stores documents in an insecure manner, such as unencrypted storage, publicly accessible storage locations, or with weak access controls on the storage medium. This makes stored documents vulnerable to unauthorized access and disclosure.
  • Impact: Mass data breach, complete loss of document confidentiality, and severe legal and reputational consequences.
  • Docuseal Component Affected: Document Storage Module, Storage Infrastructure
  • Risk Severity: Critical
  • Mitigation Strategies:
    • Encrypt documents at rest using strong encryption algorithms.
    • Implement strong access controls on the document storage location, restricting access to authorized processes and users only.
    • Regularly audit and monitor document storage security configurations.
    • Consider using secure cloud storage services with built-in security features.

Threat: Exploiting Vulnerabilities to Gain Admin Access

  • Threat: Exploiting Vulnerabilities to Gain Admin Access
  • Description: An attacker exploits software vulnerabilities in Docuseal or its dependencies to gain administrative privileges within the system. This could involve exploiting code injection flaws, authentication bypasses, or insecure configurations.
  • Impact: Full system compromise, unauthorized access to all documents and user accounts, data breaches, and complete loss of control over Docuseal.
  • Docuseal Component Affected: All Components, Codebase, Configuration
  • Risk Severity: Critical
  • Mitigation Strategies:
    • Regularly perform security audits and vulnerability scanning of Docuseal and its dependencies.
    • Apply security patches and updates promptly.
    • Implement secure coding practices to minimize vulnerabilities.
    • Follow secure configuration guidelines for Docuseal and its underlying infrastructure.

Threat: Bypassing Access Controls to Access More Documents

  • Threat: Bypassing Access Controls to Access More Documents
  • Description: An attacker exploits flaws in Docuseal's access control implementation to bypass intended restrictions and gain access to documents they are not authorized to view or manage. This could involve exploiting logical flaws, race conditions, or insecure API endpoints.
  • Impact: Unauthorized access to sensitive documents, data breaches, and potential misuse of accessed information.
  • Docuseal Component Affected: Access Control Module, API Endpoints, Authorization Logic
  • Risk Severity: High
  • Mitigation Strategies:
    • Thoroughly test and validate access control mechanisms to ensure they function as intended.
    • Implement principle of least privilege and enforce strict access control policies.
    • Regularly review and audit access control configurations and code for vulnerabilities.
    • Conduct penetration testing to identify and remediate access control bypass vulnerabilities.