CVE-2016-3957

moderate-risk
Published 2018-02-06

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.

Do I need to act?

!
12.7% chance of exploitation in next 30 days
EPSS score — higher than 87% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: 32650f0cbf2c0211195e792a219899f74856b73e
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Web2Py

References (6)

Exploit https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957...
Third Party Advisory https://github.com/web2py/web2py/blob/R-2.14.1/gluon/utils.py#L200
https://usn.ubuntu.com/4030-1/
Exploit https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957...
Third Party Advisory https://github.com/web2py/web2py/blob/R-2.14.1/gluon/utils.py#L200
https://usn.ubuntu.com/4030-1/
49
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 12/34 · Low
Exposure 5/34 · Minimal