Report DoS vulnerability in execute container endpoint#210
Report DoS vulnerability in execute container endpoint#210Vaiditya2207 wants to merge 1 commit intomainfrom
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📝 WalkthroughWalkthroughSecurity documentation was updated to replace a documented arbitrary file write vulnerability in the multipart upload handler with a Denial of Service vulnerability in the Docker execution manager caused by unbounded container waiting without timeout constraints. Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes Suggested labels
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Actionable comments posted: 1
🧹 Nitpick comments (3)
SECURITY_ISSUE.md (2)
26-39: Consider making the timeout duration configurable.The remediation hardcodes a 10-second timeout, which may be too short for legitimate code execution scenarios. C++ compilation and execution, or complex Python computations, can legitimately take longer than 10 seconds. Consider making this value configurable via environment variables or configuration files, or at minimum add a comment noting that this value should be adjusted based on expected workload characteristics.
💡 Example with configurable timeout
use std::time::Duration; use tokio::time::timeout; // Read timeout from config or environment, with a default let timeout_secs = std::env::var("EXECUTION_TIMEOUT_SECS") .ok() .and_then(|s| s.parse().ok()) .unwrap_or(30); // Default to 30 seconds // Wait for execution to finish with configurable timeout let wait_future = self.docker.wait_container::<String>(&id, None).next(); let wait_res = match timeout(Duration::from_secs(timeout_secs), wait_future).await { Ok(res) => res, Err(_) => { tracing::warn!("[Job {}] Execution timed out after {} seconds", job_id, timeout_secs); // Force cleanup and return early if let Err(e) = self.cleanup_container(&id).await { tracing::error!("[Job {}] Failed to cleanup container after timeout: {}", job_id, e); } return Err("Execution timed out".to_string()); } };🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@SECURITY_ISSUE.md` around lines 26 - 39, The hardcoded 10-second timeout should be made configurable: replace the fixed Duration::from_secs(10) used with timeout(...) around the wait_future (the call to self.docker.wait_container::<String>(&id, None).next()) by reading a configurable value (eg. from an env var like EXECUTION_TIMEOUT_SECS or config) with a sensible default, parse it into a u64/Duration, and use that Duration in timeout; also update the tracing::warn! message to include the actual timeout value and ensure cleanup_container(&id).await errors are logged if cleanup fails (reference symbols: timeout, Duration::from_secs, wait_future, self.docker.wait_container, cleanup_container, job_id, EXECUTION_TIMEOUT_SECS).
21-39: Consider additional cleanup steps beyond container removal.The recommended
cleanup_containerfunction (fromsyscore/src/docker/manager.rs:48-53) only removes the Docker container usingremove_containerwithforce: true. Depending on the architecture, there may be additional cleanup steps required when execution times out, such as:
- Persisting partial execution logs for debugging
- Updating resource accounting/metrics
- Cleaning up any channels or message queues
- Notifying monitoring/alerting systems
Review the complete execution flow to ensure all necessary cleanup is performed when a timeout occurs.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@SECURITY_ISSUE.md` around lines 21 - 39, When wrapping the docker.wait_container future with tokio::time::timeout to guard untrusted execution, ensure the timeout branch does more than call cleanup_container/remove_container; extend the timeout handling around wait_container (the future returned by self.docker.wait_container::<String>(&id, None).next()) to also persist partial logs, update metrics/resource accounting, close or drain any channels/message queues, and emit monitoring/alerting notifications before returning Err for job_id; modify or add a higher-level cleanup helper (invoked where the timeout fires) that calls self.cleanup_container(&id).await, persists logs, updates metrics, closes channels, and notifies monitoring so all necessary teardown happens on timeout rather than only force-removing the container..jules/sentinel.md (1)
5-8: Consider reverse chronological ordering for security entries.The new 2026-04-10 entry is placed after the 2024-05-18 entry. Security tracking logs typically place the newest entries first (reverse chronological order) to make it easier to see the most recent vulnerabilities. Consider moving this entry above the 2024-05-18 entry.
📋 Suggested reordering
+## 2026-04-10 - Unbounded Wait DoS in Container Execution +Vulnerability Pattern: Denial of Service via unbounded wait on untrusted execution +Systemic Cause: The execution engine (Docker manager) awaits the completion of unauthenticated user-submitted code without an explicit timeout, allowing infinite loops to hang async worker threads and exhaust resources. +Auditor Note: Always enforce strict execution timeouts using tools like tokio::time::timeout when orchestrating untrusted payloads or remote processes to prevent DoS vulnerabilities. ## 2024-05-18 - PathBuf::join Overwrite in Aether File Upload Vulnerability Pattern: Arbitrary File Write via absolute path injection in `multipart.next_field().file_name()`. Systemic Cause: The `upload_handler` blindly trusts the `filename` provided in the HTTP multipart request without sanitization. In Rust, `PathBuf::join` completely replaces the base path if the appended string is an absolute path, leading to out-of-bounds file writes. Auditor Note: Always check usages of `PathBuf::join` with user-supplied strings, especially those extracted from multipart uploads, headers, or query parameters. Look for missing sanitization of path separators and absolute paths before path concatenation. -## 2026-04-10 - Unbounded Wait DoS in Container Execution -Vulnerability Pattern: Denial of Service via unbounded wait on untrusted execution -Systemic Cause: The execution engine (Docker manager) awaits the completion of unauthenticated user-submitted code without an explicit timeout, allowing infinite loops to hang async worker threads and exhaust resources. -Auditor Note: Always enforce strict execution timeouts using tools like tokio::time::timeout when orchestrating untrusted payloads or remote processes to prevent DoS vulnerabilities.🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In @.jules/sentinel.md around lines 5 - 8, Move the "## 2026-04-10 - Unbounded Wait DoS in Container Execution" section so it appears before the "## 2024-05-18" entry, making the file reverse-chronological (newest first); preserve the exact heading text and paragraph content, keep blank-line separation between entries, and update any surrounding list or table-of-contents references if present so the newest entry is displayed first.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@SECURITY_ISSUE.md`:
- Line 36: The call to self.cleanup_container(&id).await currently ignores
errors via let _ = ..., which can leak containers; change this to handle the
Result from cleanup_container (e.g., match or if let Err(e) =
self.cleanup_container(&id).await) and on error either log the failure with
context including the container id and error, optionally implement a simple
retry/backoff or propagate the error (return Err) from the enclosing function
instead of discarding it so callers can react; locate the invocation of
cleanup_container and replace the ignore with proper error handling and logging
that references id and the cleanup_container result.
---
Nitpick comments:
In @.jules/sentinel.md:
- Around line 5-8: Move the "## 2026-04-10 - Unbounded Wait DoS in Container
Execution" section so it appears before the "## 2024-05-18" entry, making the
file reverse-chronological (newest first); preserve the exact heading text and
paragraph content, keep blank-line separation between entries, and update any
surrounding list or table-of-contents references if present so the newest entry
is displayed first.
In `@SECURITY_ISSUE.md`:
- Around line 26-39: The hardcoded 10-second timeout should be made
configurable: replace the fixed Duration::from_secs(10) used with timeout(...)
around the wait_future (the call to self.docker.wait_container::<String>(&id,
None).next()) by reading a configurable value (eg. from an env var like
EXECUTION_TIMEOUT_SECS or config) with a sensible default, parse it into a
u64/Duration, and use that Duration in timeout; also update the tracing::warn!
message to include the actual timeout value and ensure
cleanup_container(&id).await errors are logged if cleanup fails (reference
symbols: timeout, Duration::from_secs, wait_future, self.docker.wait_container,
cleanup_container, job_id, EXECUTION_TIMEOUT_SECS).
- Around line 21-39: When wrapping the docker.wait_container future with
tokio::time::timeout to guard untrusted execution, ensure the timeout branch
does more than call cleanup_container/remove_container; extend the timeout
handling around wait_container (the future returned by
self.docker.wait_container::<String>(&id, None).next()) to also persist partial
logs, update metrics/resource accounting, close or drain any channels/message
queues, and emit monitoring/alerting notifications before returning Err for
job_id; modify or add a higher-level cleanup helper (invoked where the timeout
fires) that calls self.cleanup_container(&id).await, persists logs, updates
metrics, closes channels, and notifies monitoring so all necessary teardown
happens on timeout rather than only force-removing the container.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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📒 Files selected for processing (2)
.jules/sentinel.mdSECURITY_ISSUE.md
| Err(_) => { | ||
| tracing::warn!("[Job {}] Execution timed out", job_id); | ||
| // Force cleanup and return early | ||
| let _ = self.cleanup_container(&id).await; |
There was a problem hiding this comment.
Handle cleanup errors instead of silently ignoring them.
The remediation uses let _ = self.cleanup_container(&id).await; which silently discards any errors from the cleanup operation. If cleanup_container fails (e.g., due to Docker API errors, network issues, or container already removed), the container will leak and continue consuming resources.
🔧 Proposed fix to handle cleanup errors
- let _ = self.cleanup_container(&id).await;
+ if let Err(e) = self.cleanup_container(&id).await {
+ tracing::error!("[Job {}] Failed to cleanup container after timeout: {}", job_id, e);
+ }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@SECURITY_ISSUE.md` at line 36, The call to self.cleanup_container(&id).await
currently ignores errors via let _ = ..., which can leak containers; change this
to handle the Result from cleanup_container (e.g., match or if let Err(e) =
self.cleanup_container(&id).await) and on error either log the failure with
context including the container id and error, optionally implement a simple
retry/backoff or propagate the error (return Err) from the enclosing function
instead of discarding it so callers can react; locate the invocation of
cleanup_container and replace the ignore with proper error handling and logging
that references id and the cleanup_container result.
1 participant
Identified and documented a critical Denial of Service vulnerability in
syscore/src/docker/manager.rswherewait_containeris awaited without a timeout, allowing unauthenticated attackers to exhaust server resources using infinite loops. Output formatted correctly intoSECURITY_ISSUE.mdand appended to.jules/sentinel.mdas per the Sentinel guidelines.PR created automatically by Jules for task 17608472554185837520 started by @Vaiditya2207
Summary by CodeRabbit