CVE-2018-6345

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    CVE-2018-6345

    Published: 15 Jan 2019Last Modified: 8 Jul 2026

    Summary:

    Details: The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. This affects all supported versions of HHVM (3.30.1 and 3.27.5 and below).

    References: https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html, https://github.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    HHVM-3.27.5
    HHVM-3.27.4
    HHVM-3.27.3
    HHVM-3.27.2
    HHVM-3.27.1
    HHVM-3.27.0

    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