An issue was discovered in sd-bus in systemd 239. busprocessobject() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "229-4ubuntu21.16", "binary_name": "libnss-myhostname" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libnss-myhostname-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libnss-mymachines" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libnss-mymachines-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libnss-resolve" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libnss-resolve-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libpam-systemd" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libpam-systemd-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libsystemd-dev" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libsystemd-dev-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libsystemd0" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libsystemd0-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libudev-dev" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libudev-dev-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libudev1" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libudev1-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libudev1-udeb" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "libudev1-udeb-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-container" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-container-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-coredump" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-coredump-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-dbg" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-journal-remote" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-journal-remote-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-sysv" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "systemd-sysv-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "udev" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "udev-dbgsym" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "udev-udeb" }, { "binary_version": "229-4ubuntu21.16", "binary_name": "udev-udeb-dbgsym" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-myhostname" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-myhostname-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-mymachines" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-mymachines-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-resolve" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-resolve-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-systemd" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libnss-systemd-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libpam-systemd" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libpam-systemd-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libsystemd-dev" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libsystemd0" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libsystemd0-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libudev-dev" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libudev1" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libudev1-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "libudev1-udeb" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-container" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-container-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-coredump" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-coredump-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-journal-remote" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-journal-remote-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-sysv" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-tests" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "systemd-tests-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "udev" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "udev-dbgsym" }, { "binary_version": "237-3ubuntu10.13", "binary_name": "udev-udeb" } ] }