UBUNTU-CVE-2017-11565

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    UBUNTU-CVE-2017-11565

    Published: 23 Jul 2017Last Modified: 8 Sept 2025
    Upstream:
    CVE-2017-11565

    Summary:

    Details: debian/tor.init in the Debian tor_0.2.9.11-1~deb9u1 package for Tor was designed to execute aa-exec from the standard system pathname if the apparmor package is installed, but implements this incorrectly (with a wrong assumption that the specific pathname would remain the same forever), which allows attackers to bypass intended AppArmor restrictions by leveraging the silent loss of this protection mechanism. NOTE: this does not affect systems, such as default Debian stretch installations, on which Tor startup relies on a systemd unit file (instead of this tor.init script).

    References: https://ubuntu.com/security/CVE-2017-11565, https://twitter.com/pissquark/status/888142796414226432, https://bugs.debian.org/869153, https://www.cve.org/CVERecord?id=CVE-2017-11565

    Affected packages

    Package

    Name: tor

    Purl: pkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.2.4.27-1ubuntu0.1+esm1

    Affected versions

    0.2.3.25-1
    0.2.4.19-1
    0.2.4.20-1
    0.2.4.27-1build0.14.04.1
    0.2.4.27-1ubuntu0.1

    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
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