UBUNTU-CVE-2020-35512

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    UBUNTU-CVE-2020-35512

    Published: 15 Feb 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-35512

    Summary:

    Details: A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors

    References: https://ubuntu.com/security/CVE-2020-35512, https://bugzilla.redhat.com/show_bug.cgi?id=1909101, https://gitlab.freedesktop.org/dbus/dbus/-/issues/305, https://gitlab.freedesktop.org/dbus/dbus/-/commit/2b7948ef907669e844b52c4fa2268d6e3162a70c, https://gitlab.freedesktop.org/dbus/dbus/-/commit/f3b2574f0c9faa32a59efec905921f7ef4438a60, https://gitlab.freedesktop.org/dbus/dbus/-/commit/dc94fe3d31adf72259adc31f343537151a6c0bdd, https://ubuntu.com/security/notices/USN-5244-1, https://ubuntu.com/security/notices/USN-5244-2, https://www.cve.org/CVERecord?id=CVE-2020-35512

    Affected packages

    Package

    Name: dbus

    Purl: pkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.6.12-0ubuntu10
    1.6.18-0ubuntu1
    1.6.18-0ubuntu2
    1.6.18-0ubuntu3
    1.6.18-0ubuntu4
    1.6.18-0ubuntu4.1
    1.6.18-0ubuntu4.2
    1.6.18-0ubuntu4.3
    1.6.18-0ubuntu4.4
    1.6.18-0ubuntu4.5
    1.6.18-0ubuntu4.5+esm1
    1.6.18-0ubuntu4.5+esm2
    1.6.18-0ubuntu4.5+esm3

    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