🛡️ Sentinel: [CRITICAL] Fix python command injection rule to detect os.system and os.popen - #983
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…s.system and os.popen The `python-command-injection` regex incorrectly assumed `os.system` and `os.popen` accepted a `shell=True` parameter because it grouped them together with `subprocess` functions without distinguishing the trailing suffix properly. Since `os.system` and `os.popen` execute shell commands natively without a `shell=True` argument, they were completely missed by the scanner, presenting a false negative vulnerability. I split the regex so `os.system` and `os.popen` match independently of the `shell=True` argument that applies to `subprocess` calls. Also added regression tests.
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📝 WalkthroughWalkthrough
ChangesPython 명령 주입 탐지
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The PR improves detection of shell-executing Python calls, but the current branch still risks inaccurate security findings and missed nested-argument cases. Its repair automation can also mishandle reruns and failure validation while storing an access token in Git configuration. Merge should wait for these bounded correctness and credential-handling issues to be fixed or explicitly accepted. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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…s.system and os.popen The `python-command-injection` regex incorrectly assumed `os.system` and `os.popen` accepted a `shell=True` parameter because it grouped them together with `subprocess` functions without distinguishing the trailing suffix properly. Since `os.system` and `os.popen` execute shell commands natively without a `shell=True` argument, they were completely missed by the scanner, presenting a false negative vulnerability. I split the regex so `os.system` and `os.popen` match independently of the `shell=True` argument that applies to `subprocess` calls. Also added regression tests.
…s.system and os.popen The `python-command-injection` regex incorrectly assumed `os.system` and `os.popen` accepted a `shell=True` parameter because it grouped them together with `subprocess` functions without distinguishing the trailing suffix properly. Since `os.system` and `os.popen` execute shell commands natively without a `shell=True` argument, they were completely missed by the scanner, presenting a false negative vulnerability. I split the regex so `os.system` and `os.popen` match independently of the `shell=True` argument that applies to `subprocess` calls. Also added regression tests.
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Pull request overview
OpenCode cannot approve yet because required coverage evidence did not pass.
Review outcome
1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence
-
Problem: The required coverage-evidence job result was
failure, so OpenCode cannot establish approval sufficiency for this head. -
Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.
-
Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports
successwith required evidence or explicit no-source not-applicable evidence. -
Regression test: Keep the approval branch checking
needs.coverage-evidence.result == successbefore posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present. -
Result: REQUEST_CHANGES
-
Reason: coverage-evidence result was
failure, so required test/docstring evidence was not proven for current head4b5d402c5265dfbc3444b0932a246ba6802d13d2. -
Head SHA:
4b5d402c5265dfbc3444b0932a246ba6802d13d2 -
Workflow run: 32166467370
-
Workflow attempt: 1
Coverage evidence
Coverage evidence job did not run or did not publish coverage evidence.
Changed-File Evidence Map
flowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Changed file (2 files)"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Changed file (2 files)"]
R1 --> V1["required checks"]
Evidence --> S2["Test: test_appguardrail.py"]
S2 --> I2["regression suite"]
I2 --> R2["Review risk: Test: test_appguardrail.py"]
R2 --> V2["targeted test run"]
OpenCode Review Overview
Pull request overviewOpenCode cannot approve yet because required coverage evidence did not pass. Review outcome1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence
Coverage evidenceCoverage Decision
Changed-File Evidence Mapflowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Changed file (3 files)"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Changed file (3 files)"]
R1 --> V1["required checks"]
Evidence --> S2["Test: test_appguardrail.py"]
S2 --> I2["regression suite"]
I2 --> R2["Review risk: Test: test_appguardrail.py"]
R2 --> V2["targeted test run"]
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…s.system and os.popen The `python-command-injection` regex incorrectly assumed `os.system` and `os.popen` accepted a `shell=True` parameter because it grouped them together with `subprocess` functions without distinguishing the trailing suffix properly. Since `os.system` and `os.popen` execute shell commands natively without a `shell=True` argument, they were completely missed by the scanner, presenting a false negative vulnerability. I split the regex so `os.system` and `os.popen` match independently of the `shell=True` argument that applies to `subprocess` calls. Also added regression tests.
This comment was marked as resolved.
This comment was marked as resolved.
Sorry, something went wrong.
…s.system and os.popen The `python-command-injection` regex incorrectly assumed `os.system` and `os.popen` accepted a `shell=True` parameter because it grouped them together with `subprocess` functions without distinguishing the trailing suffix properly. Since `os.system` and `os.popen` execute shell commands natively without a `shell=True` argument, they were completely missed by the scanner, presenting a false negative vulnerability. I split the regex so `os.system` and `os.popen` match independently of the `shell=True` argument that applies to `subprocess` calls. Also added regression tests.
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@opencode-agent review current head |
Ignoring command directed at another bot. |
…s.system and os.popen The `python-command-injection` regex incorrectly assumed `os.system` and `os.popen` accepted a `shell=True` parameter because it grouped them together with `subprocess` functions without distinguishing the trailing suffix properly. Since `os.system` and `os.popen` execute shell commands natively without a `shell=True` argument, they were completely missed by the scanner, presenting a false negative vulnerability. I split the regex so `os.system` and `os.popen` match independently of the `shell=True` argument that applies to `subprocess` calls. Also added regression tests.
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merge: urgent-review
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This repository does not receive automatic reviews because it has fewer than 10 stars. ⚙️ Run configurationConfiguration used: Organization UI Review profile: CHILL Plan: Pro Plus Run ID: Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
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Pull request overview
OpenCode cannot approve yet because required coverage evidence did not pass.
Review outcome
1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence
-
Problem: The required coverage-evidence job result was
failure, so OpenCode cannot establish approval sufficiency for this head. -
Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.
-
Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports
successwith required evidence or explicit no-source not-applicable evidence. -
Regression test: Keep the approval branch checking
needs.coverage-evidence.result == successbefore posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present. -
Result: REQUEST_CHANGES
-
Reason: coverage-evidence result was
failure, so required test/docstring evidence was not proven for current headbdc529efcd598973b9ac4c70742ae76b33548c49. -
Head SHA:
bdc529efcd598973b9ac4c70742ae76b33548c49 -
Workflow run: 32602452322
-
Workflow attempt: 1
Coverage evidence
Coverage Decision
- Result: FAIL
- Test evidence: not proven passing
- Docstring evidence: not proven passing when configured
- Failure count: 1
Changed-File Evidence Map
flowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Changed file (3 files)"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Changed file (3 files)"]
R1 --> V1["required checks"]
Evidence --> S2["Test: test_appguardrail.py"]
S2 --> I2["regression suite"]
I2 --> R2["Review risk: Test: test_appguardrail.py"]
R2 --> V2["targeted test run"]
|
@opencode-agent Please perform a fresh formal review of unchanged exact head |
Ignoring command directed at another bot. |
…s.system and os.popen The `python-command-injection` regex incorrectly assumed `os.system` and `os.popen` accepted a `shell=True` parameter because it grouped them together with `subprocess` functions without distinguishing the trailing suffix properly. Since `os.system` and `os.popen` execute shell commands natively without a `shell=True` argument, they were completely missed by the scanner, presenting a false negative vulnerability. I split the regex so `os.system` and `os.popen` match independently of the `shell=True` argument that applies to `subprocess` calls. Also added regression tests.
…ex-727217014950515043
There was a problem hiding this comment.
Pull request overview
OpenCode cannot approve yet because required coverage evidence did not pass.
Review outcome
1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence
-
Problem: The required coverage-evidence job result was
failure, so OpenCode cannot establish approval sufficiency for this head. -
Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.
-
Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports
successwith required evidence or explicit no-source not-applicable evidence. -
Regression test: Keep the approval branch checking
needs.coverage-evidence.result == successbefore posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present. -
Result: REQUEST_CHANGES
-
Reason: coverage-evidence result was
failure, so required test/docstring evidence was not proven for current headae7899f5abb6128c5ff6cde7bf9eedec34b880df. -
Head SHA:
ae7899f5abb6128c5ff6cde7bf9eedec34b880df -
Workflow run: 33010027485
-
Workflow attempt: 1
Coverage evidence
Coverage Decision
- Result: FAIL
- Test evidence: not proven passing
- Docstring evidence: not proven passing when configured
- Failure count: 1
Changed-File Evidence Map
flowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Changed file (3 files)"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Changed file (3 files)"]
R1 --> V1["required checks"]
Evidence --> S2["Test: test_appguardrail.py"]
S2 --> I2["regression suite"]
I2 --> R2["Review risk: Test: test_appguardrail.py"]
R2 --> V2["targeted test run"]
seonghobae
added
bug
ChatGPT Codex Connector
CI unit tests failed because the public taxonomy message now names subprocess.getoutput/getstatusoutput alongside os.system/os.popen. Keep both implicit-shell families and subprocess shell=True distinct. Relates to #983.
2 participants
🛡️ Sentinel: [CRITICAL] Fix
python-command-injectionrule to accurately detectos.systemandos.popencommand injections.🚨 Severity: CRITICAL
💡 Vulnerability: The static analysis scanner rule
python-command-injectionwas failing to flagos.system()andos.popen()calls containing unvalidated user input because the regular expression mistakenly grouped them withsubprocess.*calls and expected theshell=Truekeyword argument to be present.os.systemandos.popenexecute through a shell natively and do not take ashell=Trueargument, creating a false negative for these common command injection vectors.🎯 Impact: AI-generated applications or code using standard Python shell executions could harbor critical command injection flaws that slip past AppGuardrail's SAST checks.
🔧 Fix: Split the rule's regular expression into two branches: one to blindly catch
os.systemandos.popencalls and another to catchsubprocess.*calls conditionally requiringshell=True. Tests were added for all three execution styles.✅ Verification: Re-ran
uv run pytest tests/which showed the newly added fixtures catchingos.system,os.popen, andsubprocess.callwithshell=Trueflawlessly.PR created automatically by Jules for task 727217014950515043 started by @seonghobae
Summary by CodeRabbit
새 기능
os.system(...)및os.popen(...)호출을 지원합니다.subprocess호출에서shell=True사용도 탐지합니다.버그 수정
테스트