Summary
A broken object-level authorization issue in deeptutor lets a remote caller use a user-controlled bot identifier to access another bot's control files. An attacker who can reach the tutorbot file route may enumerate bot IDs and overwrite files that should be restricted to the owning bot or an authorized administrator.
A broken object-level authorization issue in deeptutor lets a remote caller use a user-controlled bot identifier to access another bot's control files. An attacker who can reach the tutorbot file route may enumerate bot IDs and overwrite files that should be restricted to the owning bot or an authorized administrator.
Affected context
The vulnerability occurs in deployments that expose the HTTP tutorbot file route and rely on the supplied bot identifier to select files. It becomes risky when the application does not independently verify that the caller is authorized to access the referenced bot and its whitelisted control files.
The vulnerability occurs in deployments that expose the HTTP tutorbot file route and rely on the supplied bot identifier to select files. It becomes risky when the application does not independently verify that the caller is authorized to access the referenced bot and its whitelisted control files.
Exploit preconditions
- Attack surface: HTTP tutorbot file route
- Required access: A remote caller able to reach the route; authentication requirements depend on deployment configuration
- Trigger point: A request containing a user-controlled bot identifier and a file operation
- Why exploitation is possible: The selected object is trusted without an effective authorization check binding the bot ID and file operation to the requesting principal
- Attack surface: HTTP tutorbot file route
- Required access: A remote caller able to reach the route; authentication requirements depend on deployment configuration
- Trigger point: A request containing a user-controlled bot identifier and a file operation
- Why exploitation is possible: The selected object is trusted without an effective authorization check binding the bot ID and file operation to the requesting principal
Why this happens
The underlying bug is an object-level authorization failure mapped to CWE-639: Authorization Bypass Through User-Controlled Key. The application uses an identifier supplied by the caller to locate a bot and its files, but does not consistently enforce ownership, tenancy, or role-based permissions for that object before allowing a write operation.
The underlying bug is an object-level authorization failure mapped to CWE-639: Authorization Bypass Through User-Controlled Key. The application uses an identifier supplied by the caller to locate a bot and its files, but does not consistently enforce ownership, tenancy, or role-based permissions for that object before allowing a write operation.
Potential impact
- An attacker may overwrite another bot's whitelisted control files
- Bot behavior or configuration could be altered without authorization
- The vulnerability could enable persistence or manipulation of automated workflows
- Sensitive operational state may be disrupted or replaced
- Broader compromise could occur if modified files influence privileged processes
- An attacker may overwrite another bot's whitelisted control files
- Bot behavior or configuration could be altered without authorization
- The vulnerability could enable persistence or manipulation of automated workflows
- Sensitive operational state may be disrupted or replaced
- Broader compromise could occur if modified files influence privileged processes
General mitigation guidance
Mitigation generally focuses on enforcing authorization at the object and operation level rather than trusting identifiers supplied by clients.
Common defensive patterns include:
- Performing server-side ownership, tenant, and role checks for every bot and file operation
- Binding object access to the authenticated principal and request context
- Treating client-provided identifiers as references only, not as proof of permission
- Restricting write operations to narrowly defined, approved file actions
- Applying least privilege to service accounts and file-system permissions
- Using secure-by-default denial when authorization context is missing or ambiguous
- Logging and rate-limiting identifier enumeration and unauthorized write attempts
Mitigation generally focuses on enforcing authorization at the object and operation level rather than trusting identifiers supplied by clients.
Common defensive patterns include:
- Performing server-side ownership, tenant, and role checks for every bot and file operation
- Binding object access to the authenticated principal and request context
- Treating client-provided identifiers as references only, not as proof of permission
- Restricting write operations to narrowly defined, approved file actions
- Applying least privilege to service accounts and file-system permissions
- Using secure-by-default denial when authorization context is missing or ambiguous
- Logging and rate-limiting identifier enumeration and unauthorized write attempts
How teams detect issues like this
Detection approaches commonly include:
- Static analysis and code review for routes that use request-supplied identifiers in database or file lookups
- Reviewing whether authorization checks occur before every read and write operation
- Testing access to objects belonging to other users, tenants, or bots using controlled identifiers
- Monitoring for sequential bot-ID enumeration and unexpected cross-bot file modifications
- Enforcing API policies that require explicit resource authorization and deny unscoped object access
- Using automated security review tools to flag missing object-level authorization checks
Detection approaches commonly include:
- Static analysis and code review for routes that use request-supplied identifiers in database or file lookups
- Reviewing whether authorization checks occur before every read and write operation
- Testing access to objects belonging to other users, tenants, or bots using controlled identifiers
- Monitoring for sequential bot-ID enumeration and unexpected cross-bot file modifications
- Enforcing API policies that require explicit resource authorization and deny unscoped object access
- Using automated security review tools to flag missing object-level authorization checks
Sources
| Source | Link |
|---|---|
| gist. | gist.github.com/ |
| github. | github.com/ |
| github. | github.com/ |
