Medium: systemd

Issue Overview:

A heap use-after-free vulnerability was found in systemd, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages. (CVE-2020-1712)

Affected Packages:

systemd

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update systemd to update your system.

New Packages:

aarch64:  
    systemd-219-57.amzn2.0.12.aarch64  
    systemd-libs-219-57.amzn2.0.12.aarch64  
    systemd-devel-219-57.amzn2.0.12.aarch64  
    systemd-sysv-219-57.amzn2.0.12.aarch64  
    systemd-python-219-57.amzn2.0.12.aarch64  
    libgudev1-219-57.amzn2.0.12.aarch64  
    libgudev1-devel-219-57.amzn2.0.12.aarch64  
    systemd-journal-gateway-219-57.amzn2.0.12.aarch64  
    systemd-networkd-219-57.amzn2.0.12.aarch64  
    systemd-resolved-219-57.amzn2.0.12.aarch64  
    systemd-debuginfo-219-57.amzn2.0.12.aarch64  
  
i686:  
    systemd-219-57.amzn2.0.12.i686  
    systemd-libs-219-57.amzn2.0.12.i686  
    systemd-devel-219-57.amzn2.0.12.i686  
    systemd-sysv-219-57.amzn2.0.12.i686  
    systemd-python-219-57.amzn2.0.12.i686  
    libgudev1-219-57.amzn2.0.12.i686  
    libgudev1-devel-219-57.amzn2.0.12.i686  
    systemd-journal-gateway-219-57.amzn2.0.12.i686  
    systemd-networkd-219-57.amzn2.0.12.i686  
    systemd-resolved-219-57.amzn2.0.12.i686  
    systemd-debuginfo-219-57.amzn2.0.12.i686  
  
src:  
    systemd-219-57.amzn2.0.12.src  
  
x86_64:  
    systemd-219-57.amzn2.0.12.x86_64  
    systemd-libs-219-57.amzn2.0.12.x86_64  
    systemd-devel-219-57.amzn2.0.12.x86_64  
    systemd-sysv-219-57.amzn2.0.12.x86_64  
    systemd-python-219-57.amzn2.0.12.x86_64  
    libgudev1-219-57.amzn2.0.12.x86_64  
    libgudev1-devel-219-57.amzn2.0.12.x86_64  
    systemd-journal-gateway-219-57.amzn2.0.12.x86_64  
    systemd-networkd-219-57.amzn2.0.12.x86_64  
    systemd-resolved-219-57.amzn2.0.12.x86_64  
    systemd-debuginfo-219-57.amzn2.0.12.x86_64  

Additional References

Red Hat: CVE-2020-1712

Mitre: CVE-2020-1712