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Potential fix for code scanning alert no. 2: Uncontrolled data used in path expression #54

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Potential fix for code scanning alert no. 2: Uncontrolled data used in path expression #54

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10 changes: 9 additions & 1 deletion shabda/dj.py
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Original file line number Diff line number Diff line change
Expand Up @@ -110,6 +110,8 @@ async def speak(self, word, language, gender):
"""Speak a word"""
# Only allow safe characters: letters, digits, underscore, dash
language_sanitized = re.sub(r'[^\w\-]', '', language)
word_sanitized = re.sub(r"[^\w\-]", "", word)
gender_sanitized = re.sub(r"[^\w\-]", "", gender)
sampleset = SampleSet(word, TTS, self.speech_samples_path)
existing_samples = sampleset.list(language=language_sanitized, gender=gender)
if len(existing_samples) > 0:
Expand Down Expand Up @@ -144,7 +146,13 @@ async def speak(self, word, language, gender):
response = client.synthesize_speech(
input=synthesis_input, voice=voice, audio_config=audio_config
)
filepath = word_dir + "/" + word + "_" + language_sanitized + "_" + gender + ".wav"
filename = (
word_sanitized + "_" + language_sanitized + "_" + gender_sanitized + ".wav"
)
base_dir = os.path.realpath(word_dir)
filepath = os.path.realpath(os.path.join(base_dir, filename))
if os.path.commonpath([base_dir, filepath]) != base_dir:
raise ValueError("Unsafe output path")
with open(filepath, "wb") as out:
out.write(response.audio_content)
sound = Sound(
Expand Down
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