[Openstack-security] [Bug 1367022] Re: Un-sanitized eval may have security impact
Travis McPeak
travis.mcpeak at hp.com
Mon Sep 22 14:56:20 UTC 2014
An example of an inferred value would be the case where we have
something like the following:
value_from_api = "40MB"
trans_val = value_from_api[-2:]
In this case, the trans_val is being inferred or calculated from the
last two characters of user controlled input. I'm not saying this is
the case, it's just an example.
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https://bugs.launchpad.net/bugs/1367022
Title:
Un-sanitized eval may have security impact
Status in OpenStack Telemetry (Ceilometer):
New
Status in OpenStack Security Advisories:
Won't Fix
Bug description:
On this line:
https://github.com/openstack/ceilometer/blob/master/ceilometer/transformer/conversions.py#L62
eval is used for some transformation. The comments near by suggest
that it is used for a 'multiplicative factor or else a string to be
eval'd'.
If an attacker is able to provide an input like
"__import__('os').system('rm -rf /etc')" the process will delete the
etc directory with the privileges of the user that is running
Ceilometer.
Eval input should always be sanitized. I was unable to find any
places that this is actually used, but this should definitely be
hardened.
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