T05 · Unauthorized Access and Privilege Escalation
Error
- Location
utils.py:220- Finding
Redirect and DNS Resolution Gaps Allow Server-Side Request Forgery
- Content
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str: validate_video_url(url) import requests temp_file = tempfile.NamedTemporaryFile(suffix='.mp4', delete=False) temp_path = temp_file.name temp_file.close() response = requests.get(url, stream=True, timeout=timeout) with open(temp_path, 'wb') as f: for chunk in response.iter_content(chunk_size=8192): f.write(chunk) return temp_path ``` The remote frame extractor performs the same initial-only validation: ```python def __init__(self, video_url: str, timeout: int = 30): validate_video_url(video_url) self.video_url = video_url self.timeout = timeout self.session = requests.Session() ``` ```python def _get_file_size(self) -> int: response = self.session.head(self.video_url, timeout=self.timeout) if 'content-length' in response.headers: return int(response.headers['content-length']) response = self.session.get(self.video_url, stream=True, timeout=self.timeout) return int(response.headers.get('content-length', 0)) def _download_range(self, start: int, end: int) -> bytes: headers = {'Range': f'bytes={start}-{end}'} response = self.session.get(self.video_url, headers=headers, timeout=self.timeout) if response.status_code in [200, 206]: return response.content raise Exception(f"HTTP Range request failed: {response.status_code}") ``` FFmpeg-backed processing similarly passes the validated URL to a separate network client: ```python cmd = ['ffmpeg', '-i', video_url] ``` ### Technical Analysis `validate_video_url()` rejects an initial hostname if ...[truncated 2245 chars]- Remediation
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