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    CVE-2020-8516

    The daemon in Tor through 0.4.1.8 and 0.4.2.x through 0.4.2.6 does not verify that a rendezvous node is known before attempting to connect to it, which might make it easier for remote attackers to discover circuit information. NOTE: The network team of Tor claims this is an intended behavior and not a vulnerability

    Published:Feb 2, 2020
    Last Modified:Nov 21, 2024
    EPS:Feb 2, 2020
    EPSS Score:0.00783
    CVSS Score:5.3

    Affected Products

    Vendor
    Torproject
    Product
    Tor

    Exploits

    https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.htmlhttps://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-77639 (CVSS 5.3) — Tor before 0.4.9.9 was prone to a compression bomb bypass where an attacker could concatenate many gzip or zli…
    CVE-2026-77638 (CVSS 8.9) — Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point coul…
    CVE-2026-77587 (CVSS 5.9) — Tor before 0.4.9.11 is prone to a use-after-free (and potential double free) of a conflux object when a recove…
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    CVE-2026-44603 (CVSS 3.7) — Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007.…
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    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