Amazon Linux 2 Security Advisory: ALAS-2019-1141
Advisory Release Date: 2019-01-07 21:58 Pacific
Advisory Updated Date: 2019-01-09 18:00 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
Large syslogd messages sent to journald can cause stack corruption, causing journald to crash. The version of systemd on Amazon Linux 2 is not vulnerable to privilege escalation in this case. (CVE-2018-16864)
Large native messages to journald can cause stack corruption, leading to possible local privilege escalation.(CVE-2018-16865)
Please note, if you have systemd-journald-remote configured over http, then you could be open to remote escalation on previous versions of the systemd package. The systemd-journald-remote service is not installed by default on Amazon Linux 2, and when installed and enabled, the default configuration is to use https. (CVE-2018-16865)
An out-of-bounds read in journald, triggered by a specially crafted message, can be used to leak information through the journal file (CVE-2018-16866)
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 then reboot your instance, to update your system.
aarch64:
systemd-219-57.amzn2.0.7.aarch64
systemd-libs-219-57.amzn2.0.7.aarch64
systemd-devel-219-57.amzn2.0.7.aarch64
systemd-sysv-219-57.amzn2.0.7.aarch64
systemd-python-219-57.amzn2.0.7.aarch64
libgudev1-219-57.amzn2.0.7.aarch64
libgudev1-devel-219-57.amzn2.0.7.aarch64
systemd-journal-gateway-219-57.amzn2.0.7.aarch64
systemd-networkd-219-57.amzn2.0.7.aarch64
systemd-resolved-219-57.amzn2.0.7.aarch64
systemd-debuginfo-219-57.amzn2.0.7.aarch64
i686:
systemd-219-57.amzn2.0.7.i686
systemd-libs-219-57.amzn2.0.7.i686
systemd-devel-219-57.amzn2.0.7.i686
systemd-sysv-219-57.amzn2.0.7.i686
systemd-python-219-57.amzn2.0.7.i686
libgudev1-219-57.amzn2.0.7.i686
libgudev1-devel-219-57.amzn2.0.7.i686
systemd-journal-gateway-219-57.amzn2.0.7.i686
systemd-networkd-219-57.amzn2.0.7.i686
systemd-resolved-219-57.amzn2.0.7.i686
systemd-debuginfo-219-57.amzn2.0.7.i686
src:
systemd-219-57.amzn2.0.7.src
x86_64:
systemd-219-57.amzn2.0.7.x86_64
systemd-libs-219-57.amzn2.0.7.x86_64
systemd-devel-219-57.amzn2.0.7.x86_64
systemd-sysv-219-57.amzn2.0.7.x86_64
systemd-python-219-57.amzn2.0.7.x86_64
libgudev1-219-57.amzn2.0.7.x86_64
libgudev1-devel-219-57.amzn2.0.7.x86_64
systemd-journal-gateway-219-57.amzn2.0.7.x86_64
systemd-networkd-219-57.amzn2.0.7.x86_64
systemd-resolved-219-57.amzn2.0.7.x86_64
systemd-debuginfo-219-57.amzn2.0.7.x86_64