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    CVE-2021-39246

    Tor Browser through 10.5.6 and 11.x through 11.0a4 allows a correlation attack that can compromise the privacy of visits to v2 onion addresses. Exact timestamps of these onion-service visits are logged locally, and an attacker might be able to compare them to timestamp data collected by the destination server (or collected by a rogue site within the Tor network).

    Published:Sep 24, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 24, 2021
    EPSS Score:0.00108
    CVSS Score:6.1

    Affected Products

    Vendor
    Apple
    Product
    Macos
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Torproject
    Product
    Tor Browser

    Exploits

    https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-111.mdhttps://sick.codes/sick-2021-111https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-111.mdhttps://sick.codes/sick-2021-111

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-215 Fuzzing for application mapping

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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