SB2019062811 - Improper access control in web2py

Description

This security bulletin contains information about 1 vulnerability.

1) Improper access control (CVE-ID: CVE-2016-3952)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

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.

Remediation

Install update from vendor's website.

References

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