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    CVE-2020-12049

    An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus-daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.

    Published:Jun 4, 2020
    Last Modified:Nov 21, 2024
    EPS:Jun 8, 2020
    EPSS Score:0.00023
    CVSS Score:5.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Freedesktop
    Product
    Dbus
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    https://gitlab.freedesktop.org/dbus/dbus/-/issues/294https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leakhttps://gitlab.freedesktop.org/dbus/dbus/-/issues/294https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak

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    References

    http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
    http://www.openwall.com/lists/oss-security/2020/06/04/3
    https://gitlab.freedesktop.org/dbus/dbus/-/issues/294
    https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30
    https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18
    https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16
    https://security.gentoo.org/glsa/202007-46
    https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak
    https://usn.ubuntu.com/4398-1/
    https://usn.ubuntu.com/4398-2/
    http://packetstormsecurity.com/files/172840/D-Bus-File-Descriptor-Leak-Denial-Of-Service.html
    http://www.openwall.com/lists/oss-security/2020/06/04/3
    https://gitlab.freedesktop.org/dbus/dbus/-/issues/294
    https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.10.30
    https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.12.18
    https://gitlab.freedesktop.org/dbus/dbus/-/tags/dbus-1.13.16
    https://security.gentoo.org/glsa/202007-46
    https://securitylab.github.com/advisories/GHSL-2020-057-DBus-DoS-file-descriptor-leak
    https://usn.ubuntu.com/4398-1/
    https://usn.ubuntu.com/4398-2/

    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