Improper access control in web2py

1) Improper access control

EUVDB-ID: #VU18925

Risk: Medium

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2016-3952

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to the affected software allows access to environment variable values if a request is made to the "examples/template_examples/beautify" page. A remote authenticated attacker can gain administrative access to affected software on a targeted system.

Note, the vulnerability affects standalone version only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

web2py: 2.0.0 - 2.14.0

External links

http://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/
http://github.com/web2py/web2py/commit/9706d125b42481178d2b423de245f5d2faadbf40

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.