UBUNTU-CVE-2021-34550

    Dashboard / Vulnerabilities / UBUNTU-CVE-2021-34550

    UBUNTU-CVE-2021-34550

    Published: 29 Jun 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-34550
    Aliases:
    USN-5036-1

    Summary:

    Details: An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor

    References: https://ubuntu.com/security/CVE-2021-34550, https://blog.torproject.org/node/2041, https://gitlab.torproject.org/tpo/core/tor/-/commit/f57b5c48e0aa01acd84a194fe4657a0d1cee04cf, https://ubuntu.com/security/notices/USN-5036-1, https://www.cve.org/CVERecord?id=CVE-2021-34550

    Affected packages

    Package

    Name: tor

    Purl: pkg:deb/ubuntu/[email protected]~esm2?arch=source&distro=esm-apps/bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.3.2.10-1ubuntu0.2~esm2

    Affected versions

    0.3.0.10-1
    0.3.1.8-2
    0.3.1.9-1
    0.3.2.9-1
    0.3.2.9-1build1
    0.3.2.10-1
    0.3.2.10-1ubuntu0.1
    0.3.2.10-1ubuntu0.2~esm1

    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
    UBUNTU-CVE-2021-34550 | CVE-DB