CVE-2021-28089

    Dashboard / Vulnerabilities / CVE-2021-28089

    CVE-2021-28089

    Published: 19 Mar 2021Last Modified: 8 Jul 2026

    Summary:

    Details: Tor before 0.4.5.7 allows a remote participant in the Tor directory protocol to exhaust CPU resources on a target, aka TROVE-2021-001.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPDXB2GZHG3VNOTWSXQ3QZVHNV76WCU5/, https://blog.torproject.org/node/2009, https://gitlab.torproject.org/tpo/core/tor/-/issues/40304, https://security.gentoo.org/glsa/202107-25

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -50d4300e77ea2f8f7d17aade1b9f32f38cffbcde

    Affected versions

    0.4.4.0-alpha
    0.4.4.1-alpha
    0.4.4.2-alpha
    0.4.4.3-alpha

    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-2021-28089 | CVE-DB