UBUNTU-CVE-2016-1938

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    UBUNTU-CVE-2016-1938

    Published: 26 Jan 2016Last Modified: 22 Apr 2026
    Upstream:
    CVE-2016-1938

    Summary:

    Details: The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging use of the (1) mp_div or (2) mp_exptmod function.

    References: https://ubuntu.com/security/CVE-2016-1938, https://www.mozilla.org/en-US/security/advisories/mfsa2016-07/, https://ubuntu.com/security/notices/USN-2880-1, https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html, https://ubuntu.com/security/notices/USN-2903-1, https://ubuntu.com/security/notices/USN-2973-1, https://www.cve.org/CVERecord?id=CVE-2016-1938

    Affected packages

    Package

    Name: firefox

    Purl: pkg:deb/ubuntu/[email protected]+build3-0ubuntu0.14.04.1?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -44.0+build3-0ubuntu0.14.04.1

    Affected versions

    24.0+build1-0ubuntu1

    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