gemini-code-assist[bot] commented on code in PR #35733:
URL: https://github.com/apache/beam/pull/35733#discussion_r2241457073


##########
sdks/python/scripts/run_pytest.sh:
##########
@@ -62,16 +81,60 @@ if [[ -n $user_marker ]]; then
   marker_for_sequential_tests="($user_marker) and 
($marker_for_sequential_tests)"
 fi
 
+# Parse posargs to separate pytest options from test paths.
+options=""
+test_paths=""
+
+# Safely split the posargs string into individual arguments.
+eval "set -- $posargs"

Review Comment:
   I understand your concerns regarding increased complexity and the review 
process in CI environments. However, the use of `eval` with user-controlled 
input like `$posargs` inherently introduces a critical command injection 
vulnerability. This is a fundamental security flaw that allows arbitrary code 
execution, regardless of whether the script is run in a CI environment or how 
frequently it's reviewed.
   
   Even in a controlled CI setting, a successful exploit could lead to severe 
consequences, such as data exfiltration, system compromise, or disruption of 
the build process. While parsing shell arguments safely can be complex, the 
security implications of `eval` on untrusted input are too significant to 
ignore. Prioritizing security often necessitates refactoring for safer 
alternatives, even if it introduces some additional complexity.
   
   I maintain that this is a `critical` issue that should be addressed to 
prevent potential security breaches.



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