CVE-2021-40540

    Dashboard / Vulnerabilities / CVE-2021-40540

    CVE-2021-40540

    Published: 7 Sept 2021Last Modified: 9 Jul 2026

    Summary:

    Details: ulfius_uri_logger in Ulfius HTTP Framework before 2.7.4 omits con_info initialization and a con_info->request NULL check for certain malformed HTTP requests.

    References: https://github.com/babelouest/ulfius/commit/c83f564c184a27145e07c274b305cabe943bbfaa, https://github.com/babelouest/ulfius/compare/v2.7.3...v2.7.4, http://packetstormsecurity.com/files/164152/Ulfius-Web-Framework-Remote-Memory-Corruption.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -845a5f471b0f2d2578b0997f531e503d31fda2ae

    Affected versions

    v2.7.3
    v2.7.2
    v2.7.1
    v2.7.0

    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-2021-40540 | CVE-DB