Vulnerability CVE-2011-4211
Published: 2011-10-30   Modified: 2012-02-13

Description:
The FakeFile implementation in the sandbox environment in the Google App Engine Python SDK before 1.5.4 does not properly control the opening of files, which allows local users to bypass intended access restrictions and create arbitrary files via ALLOWED_MODES and ALLOWED_DIRS changes within the code parameter to _ah/admin/interactive/execute, a different vulnerability than CVE-2011-1364.

Type:

CWE-264

 (Permissions, Privileges, and Access Controls)

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Google -> App engine python sdk 

 References:
http://code.google.com/p/googleappengine/wiki/SdkReleaseNotes
http://xforce.iss.net/xforce/xfdb/71064
http://www.securityfocus.com/bid/50464
http://blog.watchfire.com/files/googleappenginesdk.pdf
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