Summary
A path traversal vulnerability in deeptutor's EditFileTool allows a remote caller using the live tutorbot WebSocket interface to write to or edit absolute paths outside the intended bot workspace. The issue becomes critical when the WebSocket interface is reachable by an attacker and the tool accepts attacker-influenced file paths without effective confinement.
A path traversal vulnerability in deeptutor's EditFileTool allows a remote caller using the live tutorbot WebSocket interface to write to or edit absolute paths outside the intended bot workspace. The issue becomes critical when the WebSocket interface is reachable by an attacker and the tool accepts attacker-influenced file paths without effective confinement.
Affected context
The vulnerability occurs in deeptutor 1.4.0 when the live tutorbot WebSocket interface exposes EditFileTool.execute and permits caller-controlled paths. Deployments are at risk when path handling does not enforce a trusted workspace boundary and the service account can modify sensitive files outside that workspace.
The vulnerability occurs in deeptutor 1.4.0 when the live tutorbot WebSocket interface exposes EditFileTool.execute and permits caller-controlled paths. Deployments are at risk when path handling does not enforce a trusted workspace boundary and the service account can modify sensitive files outside that workspace.
Exploit preconditions
- Attack surface: Live tutorbot WebSocket interface
- Required access: Ability to connect to the exposed interface and invoke the file-editing tool
- Trigger point: EditFileTool.execute processing an attacker-influenced path
- Why exploitation is possible: The tool accepts absolute or traversal-resolving paths without reliably constraining operations to the intended bot workspace
- Attack surface: Live tutorbot WebSocket interface
- Required access: Ability to connect to the exposed interface and invoke the file-editing tool
- Trigger point: EditFileTool.execute processing an attacker-influenced path
- Why exploitation is possible: The tool accepts absolute or traversal-resolving paths without reliably constraining operations to the intended bot workspace
Why this happens
The underlying bug is insufficient path validation and workspace confinement in a file-writing operation. When user-controlled path values are resolved without canonicalization and strict boundary checks, absolute paths or traversal sequences can escape the intended directory. This behavior maps to CWE-22: Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal.
The underlying bug is insufficient path validation and workspace confinement in a file-writing operation. When user-controlled path values are resolved without canonicalization and strict boundary checks, absolute paths or traversal sequences can escape the intended directory. This behavior maps to CWE-22: Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal.
Potential impact
- An attacker may create or modify files outside the bot workspace
- Sensitive application, configuration, or user data could be overwritten
- Modified files could alter application behavior or persistence
- The service account's permissions could enable broader host or container compromise
- Availability or integrity of connected services could be affected
- An attacker may create or modify files outside the bot workspace
- Sensitive application, configuration, or user data could be overwritten
- Modified files could alter application behavior or persistence
- The service account's permissions could enable broader host or container compromise
- Availability or integrity of connected services could be affected
General mitigation guidance
Mitigation generally focuses on enforcing a non-bypassable workspace boundary and reducing the trust placed in tool arguments.
Common defensive patterns include:
- Resolve candidate paths canonically and verify they remain beneath an approved workspace
- Reject absolute paths, traversal components, symlink escapes, and ambiguous path encodings
- Prefer file identifiers or workspace-relative paths over arbitrary filesystem paths
- Apply allowlists for editable files and permitted operations
- Run the tutorbot with a dedicated low-privilege service account
- Restrict WebSocket exposure through authentication, authorization, network policy, and rate controls
- Use read-only mounts or isolated writable directories where file editing is not required
Mitigation generally focuses on enforcing a non-bypassable workspace boundary and reducing the trust placed in tool arguments.
Common defensive patterns include:
- Resolve candidate paths canonically and verify they remain beneath an approved workspace
- Reject absolute paths, traversal components, symlink escapes, and ambiguous path encodings
- Prefer file identifiers or workspace-relative paths over arbitrary filesystem paths
- Apply allowlists for editable files and permitted operations
- Run the tutorbot with a dedicated low-privilege service account
- Restrict WebSocket exposure through authentication, authorization, network policy, and rate controls
- Use read-only mounts or isolated writable directories where file editing is not required
How teams detect issues like this
Organizations can look for path traversal risks through:
- Static analysis rules identifying filesystem operations that consume WebSocket, RPC, or other user-controlled input
- Code review checks for canonicalization followed by explicit workspace-boundary validation
- Tests covering absolute paths, traversal sequences, symlink resolution, alternate encodings, and race conditions
- Runtime monitoring for file writes outside approved directories
- Policy enforcement that limits tool permissions and blocks unauthorized filesystem targets
- Automated security review tools that flag untrusted path construction and unconstrained file APIs
Organizations can look for path traversal risks through:
- Static analysis rules identifying filesystem operations that consume WebSocket, RPC, or other user-controlled input
- Code review checks for canonicalization followed by explicit workspace-boundary validation
- Tests covering absolute paths, traversal sequences, symlink resolution, alternate encodings, and race conditions
- Runtime monitoring for file writes outside approved directories
- Policy enforcement that limits tool permissions and blocks unauthorized filesystem targets
- Automated security review tools that flag untrusted path construction and unconstrained file APIs
Sources
| Source | Link |
|---|---|
| gist. | gist.github.com/ |
| github. | github.com/ |
