CVE-2021-32921

    Dashboard / Vulnerabilities / CVE-2021-32921

    CVE-2021-32921

    Published: 13 May 2021Last Modified: 15 Mar 2026

    Summary:

    Details: An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. This can potentially be used in a timing attack to reveal the contents of secret strings to an attacker.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/, https://www.debian.org/security/2021/dsa-4916, http://www.openwall.com/lists/oss-security/2021/05/14/2, https://blog.prosody.im/prosody-0.11.9-released/, https://lists.debian.org/debian-lts-announce/2021/06/msg00016.html, https://security.gentoo.org/glsa/202105-15, http://www.openwall.com/lists/oss-security/2021/05/13/1, https://lists.debian.org/debian-lts-announce/2021/06/msg00018.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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-2021-32921 | CVE-DB