CVE-2020-1898

    Dashboard / Vulnerabilities / CVE-2020-1898

    CVE-2020-1898

    Published: 11 Mar 2021Last Modified: 9 Jul 2026

    Summary:

    Details: The fb_unserialize function did not impose a depth limit for nested deserialization. That meant a maliciously constructed string could cause deserialization to recurse, leading to stack exhaustion. This issue affected HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

    References: https://hhvm.com/blog/2020/06/30/security-update.html, https://github.com/facebook/hhvm/commit/1746dfb11fc0048366f34669e74318b8278a684c

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -d6af4b525b31c96526b2508642d58dbf5c7d496c

    Affected versions

    4.57.0

    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
    CVE-2020-1898 | CVE-DB