CVE-2021-39246

    Dashboard / Vulnerabilities / CVE-2021-39246

    CVE-2021-39246

    Published: 24 Sept 2021Last Modified: 11 Apr 2026

    Summary:

    Details: 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).

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Affected versions

    debian-version-0.0.1+0.0.2pre19-1
    debian-version-0.0.1+0.0.2pre20-1
    debian-version-0.0.1+0.0.2pre20-2
    debian-version-0.0.1+0.0.2pre21-1
    debian-version-0.0.1+0.0.2pre22-1
    debian-version-0.0.1+0.0.2pre23-1
    debian-version-0.0.1+0.0.2pre24-1
    debian-version-0.0.1+0.0.2pre25-1
    debian-version-0.0.1+0.0.2pre26-1
    debian-version-0.0.1+0.0.2pre27-1
    debian-version-0.0.2-1
    debian-version-0.0.3-1
    debian-version-0.0.4-1
    debian-version-0.0.5+0.0.6rc2-1
    debian-version-0.0.5+0.0.6rc3-1
    debian-version-0.0.5+0.0.6rc4-1
    debian-version-0.0.5-1
    debian-version-0.0.6-1
    debian-version-0.0.6.1-1
    debian-version-0.0.6.2-1
    debian-version-0.0.7+0.0.8rc1-1
    debian-version-0.0.7-1
    debian-version-0.0.7.1-1
    debian-version-0.0.7.2+0.0.8pre2-1
    debian-version-0.0.7.2+0.0.8pre3-1
    debian-version-0.0.8+0.0.9pre1-1
    debian-version-0.0.8+0.0.9pre2-1
    debian-version-0.0.8+0.0.9pre3-1
    debian-version-0.0.8+0.0.9pre4-1
    debian-version-0.0.8+0.0.9pre5-1
    debian-version-0.0.8+0.0.9pre5-2
    debian-version-0.0.8+0.0.9pre6-1
    debian-version-0.0.8+0.0.9rc1-1
    debian-version-0.0.8+0.0.9rc2-1
    debian-version-0.0.8+0.0.9rc3-1
    debian-version-0.0.8+0.0.9rc5-1
    debian-version-0.0.8+0.0.9rc6-1
    debian-version-0.0.8+0.0.9rc7-1
    debian-version-0.0.8-1
    debian-version-0.0.9.1-1
    debian-version-0.0.9.10-1
    debian-version-0.0.9.2-1
    debian-version-0.0.9.3-1
    debian-version-0.0.9.4-1
    debian-version-0.0.9.5-1
    debian-version-0.0.9.6-1
    debian-version-0.0.9.7-1
    debian-version-0.0.9.8-1
    debian-version-0.0.9.9-1

    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-2021-39246 | CVE-DB