CVE-2011-4211

Severity: high (CVSS 7.2 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-10-30 · updated 2026-06-16
Weakness: CWE-264

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.

Affected products

Google App Engine Python Sdk: through 1.5.3; 1.0.1, 1.0.2, 1.1.0, 1.1.1, 1.1.2, 1.1.3 (+30)

References

http://blog.watchfire.com/files/googleappenginesdk.pdf
http://code.google.com/p/googleappengine/wiki/SdkReleaseNotes
http://www.securityfocus.com/bid/50464
https://exchange.xforce.ibmcloud.com/vulnerabilities/71064
http://blog.watchfire.com/files/googleappenginesdk.pdf
http://code.google.com/p/googleappengine/wiki/SdkReleaseNotes
http://www.securityfocus.com/bid/50464
https://exchange.xforce.ibmcloud.com/vulnerabilities/71064

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