CVE-2016-3957

Public Exploit

Description

The secure_load function in gluon/utils.py in web2py before 2.14.2 uses pickle.loads to deserialize session information stored in cookies, which might allow remote attackers to execute arbitrary code by leveraging knowledge of encryption_key.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 15.04% Top 10%
Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/ exploit third party advisory technical description
https://github.com/web2py/web2py/blob/R-2.14.1/gluon/utils.py#L200 third party advisory
https://usn.ubuntu.com/4030-1/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-3957?
CVE-2016-3957 has been scored as a critical severity vulnerability.
How to fix CVE-2016-3957?
To fix CVE-2016-3957, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-3957 being actively exploited in the wild?
It is possible that CVE-2016-3957 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~15% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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