CVE-2016-3953

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

The sample web application in web2py before 2.14.2 might allow remote attackers to execute arbitrary code via vectors involving use of a hardcoded encryption key when calling the session.connect function.

Metrics

CVSS 3.0 9.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-798

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/Exploit, Technical Description, Third Party Advisory
https://github.com/web2py/web2py/blob/R-2.14.1/applications/examples/models/session.pyThird Party Advisory
https://usn.ubuntu.com/4030-1/
https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/Exploit, Technical Description, Third Party Advisory
https://github.com/web2py/web2py/blob/R-2.14.1/applications/examples/models/session.pyThird Party Advisory
https://usn.ubuntu.com/4030-1/

Timeline

Published: Feb 6, 2018
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2016

CVE-2016-39545.5web2py before 2.14.2 allows remote attackers to obtain the session_cookie_key value via a direct request to examples/simple_examples/status.CVE-2016-39559.8The usbip_recv_xbuff function in drivers/usb/usbip/usbip_common.c in the Linux kernel before 4.5.3 allows remote attackers to cause a denial CVE-2016-39567.5The CLI in npm before 2.15.1 and 3.x before 3.8.3, as used in Node.js 0.10 before 0.10.44, 0.12 before 0.12.13, 4 before 4.4.2, and 5 before CVE-2016-39579.8The secure_load function in gluon/utils.py in web2py before 2.14.2 uses pickle.loads to deserialize session information stored in cookies, w CVE-2016-39587.8Untrusted search path vulnerability in Go before 1.5.4 and 1.6.x before 1.6.1 on Windows allows local users to gain privileges via a Trojan CVE-2016-39597.5The Verify function in crypto/dsa/dsa.go in Go before 1.5.4 and 1.6.x before 1.6.1 does not properly check parameters passed to the big inte CVE-2016-39608.8Integer overflow in the x86 shadow pagetable code in Xen allows local guest OS users to cause a denial of service (host crash) or possibly g CVE-2016-39615.5Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to CVE-2016-39627.3Stack-based buffer overflow in the NTP time-server interface on Meinberg IMS-LANTIME M3000, IMS-LANTIME M1000, IMS-LANTIME M500, LANTIME M90 CVE-2016-39635.3Siemens SCALANCE S613 allows remote attackers to cause a denial of service (web-server outage) via traffic to TCP port 443.CVE-2016-39686.1Multiple cross-site scripting (XSS) vulnerabilities in Sophos Cyberoam CR100iNG UTM appliance with firmware 10.6.3 MR-1 build 503, CR35iNG U CVE-2016-39696.1Cross-site scripting (XSS) vulnerability in McAfee Email Gateway (MEG) 7.6.x before 7.6.404, when File Filtering is enabled with the action