UBUNTU-CVE-2016-3957

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    UBUNTU-CVE-2016-3957

    Published: 6 Feb 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2016-3957
    Aliases:
    USN-4030-1

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2016-3957, https://devco.re/blog/2017/01/03/web2py-unserialize-code-execution-CVE-2016-3957/, https://github.com/web2py/web2py/blob/R-2.14.1/gluon/utils.py#L200, https://ubuntu.com/security/notices/USN-4030-1, https://www.cve.org/CVERecord?id=CVE-2016-3957

    Affected packages

    Package

    Name: web2py

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.12.3-1ubuntu0.1

    Affected versions

    1.99.7-1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High