CVE-2011-4894

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    CVE-2011-4894

    Published: 23 Dec 2011Last Modified: 10 Apr 2026

    Summary:

    Details: Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection for a directory fetch, which makes it easier for remote attackers to enumerate bridges by observing DirPort connections.

    References: https://blog.torproject.org/blog/tor-02234-released-security-patches, https://blog.torproject.org/blog/tor-02234-released-security-patches

    Affected packages

    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