Fix a possible shell command injection in the linux.service action #4675
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Kami
commented
May 13, 2019
| if len(sys.argv) < 3: | ||
| raise ValueError('Usage: service.py <action> <service>') | ||
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| args = {'act': quote_unix(sys.argv[1]), 'service': quote_unix(sys.argv[2])} |
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This is now not strictly needed since subprocess.Popen already takes case of that when a list of args and shell=False is used.
jinpingh
approved these changes
May 14, 2019
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This pull request fixes a possible shell command injection in
linux.serviceaction.Background, Context
The code didn't escape
serviceandactionparameter passed tosubprocess.Popenand usedshell=True.This pull request fixes the action to use
shell=Falseand passes command tosubprocess.Popenas a list of arguments instead of as a string (in this scenario, values are automatically escaped bysubprocess.Popen).This issue was reported to us by James Robinson (Netskope and Veracode).