USN-3855-1: systemd vulnerabilities

  • USN-3855-1: systemd vulnerabilities

    Ubuntu Security Notices wrote:

    systemd vulnerabilities

    A security issue affects these releases of Ubuntu and its derivatives:

    • Ubuntu 18.10
    • Ubuntu 18.04 LTS
    • Ubuntu 16.04 LTS

    Summary

    Several security issues were fixed in systemd.

    Software Description

    • systemd - system and service manager

    Details

    It was discovered that systemd-journald allocated variable-length buffers for certain message fields on the stack. A local attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2018-16864)

    It was discovered that systemd-journald allocated variable-length arrays of objects representing message fields on the stack. A local attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (CVE-2018-16865)

    An out-of-bounds read was discovered in systemd-journald. A local attacker could potentially exploit this to obtain sensitive information and bypass ASLR protections. (CVE-2018-16866)

    Update instructions

    The problem can be corrected by updating your system to the following package versions:

    Ubuntu 18.10
    systemd - 239-7ubuntu10.6
    Ubuntu 18.04 LTS
    systemd - 237-3ubuntu10.11
    Ubuntu 16.04 LTS
    systemd - 229-4ubuntu21.15

    To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

    After a standard system update you need to reboot your computer to make all the necessary changes.

    References

    Source: usn.ubuntu.com/3855-1/