CVE-2018-0491

    Dashboard / Vulnerabilities / CVE-2018-0491

    CVE-2018-0491

    Published: 5 Mar 2018Last Modified: 8 Jul 2026

    Summary:

    Details: A use-after-free issue was discovered in Tor 0.3.2.x before 0.3.2.10. It allows remote attackers to cause a denial of service (relay crash) because the KIST implementation allows a channel to be added more than once in the pending list.

    References: https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915, https://trac.torproject.org/projects/tor/ticket/24700, https://trac.torproject.org/projects/tor/ticket/25117, https://www.exploit-db.com/exploits/44994/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -31cc63deb69db819ed55aca406ebaaa52500730e

    Affected versions

    tor-0.3.2.9
    tor-0.3.2.8-rc
    tor-0.3.2.7-rc
    tor-0.3.2.6-alpha
    tor-0.3.2.5-alpha
    tor-0.3.2.4-alpha
    tor-0.3.2.3-alpha
    tor-0.3.2.2-alpha
    tor-0.3.2.1-alpha
    tor-0.3.1.3-alpha
    tor-0.3.1.2-alpha
    tor-0.3.1.1-alpha
    tor-0.3.0.3-alpha
    tor-0.3.0.2-alpha
    tor-0.3.0.1-alpha

    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-2018-0491 | CVE-DB