Amazon Linux 2 Security Advisory: ALAS-2019-1160
Advisory Release Date: 2019-02-13 18:37 Pacific
Advisory Updated Date: 2019-02-14 04:04 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when a program with long command line arguments calls syslog. A local attacker may use this flaw to crash systemd-journald or escalate privileges.(CVE-2018-16864)
It was discovered that systemd-network does not correctly keep track of a buffer size when constructing DHCPv6 packets. This flaw may lead to an integer underflow that can be used to produce an heap-based buffer overflow. A malicious host on the same network segment as the victim's one may advertise itself as a DHCPv6 server and exploit this flaw to cause a Denial of Service or potentially gain code execution on the victim's machine.(CVE-2018-15688)
An allocation of memory without limits, that could result in the stack clashing with another memory region, was discovered in systemd-journald when many entries are sent to the journal socket. A local attacker, or a remote one if systemd-journal-remote is used, may use this flaw to crash systemd-journald or execute code with journald privileges.(CVE-2018-16865)
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.
aarch64:
systemd-219-57.amzn2.0.8.aarch64
systemd-libs-219-57.amzn2.0.8.aarch64
systemd-devel-219-57.amzn2.0.8.aarch64
systemd-sysv-219-57.amzn2.0.8.aarch64
systemd-python-219-57.amzn2.0.8.aarch64
libgudev1-219-57.amzn2.0.8.aarch64
libgudev1-devel-219-57.amzn2.0.8.aarch64
systemd-journal-gateway-219-57.amzn2.0.8.aarch64
systemd-networkd-219-57.amzn2.0.8.aarch64
systemd-resolved-219-57.amzn2.0.8.aarch64
systemd-debuginfo-219-57.amzn2.0.8.aarch64
i686:
systemd-219-57.amzn2.0.8.i686
systemd-libs-219-57.amzn2.0.8.i686
systemd-devel-219-57.amzn2.0.8.i686
systemd-sysv-219-57.amzn2.0.8.i686
systemd-python-219-57.amzn2.0.8.i686
libgudev1-219-57.amzn2.0.8.i686
libgudev1-devel-219-57.amzn2.0.8.i686
systemd-journal-gateway-219-57.amzn2.0.8.i686
systemd-networkd-219-57.amzn2.0.8.i686
systemd-resolved-219-57.amzn2.0.8.i686
systemd-debuginfo-219-57.amzn2.0.8.i686
src:
systemd-219-57.amzn2.0.8.src
x86_64:
systemd-219-57.amzn2.0.8.x86_64
systemd-libs-219-57.amzn2.0.8.x86_64
systemd-devel-219-57.amzn2.0.8.x86_64
systemd-sysv-219-57.amzn2.0.8.x86_64
systemd-python-219-57.amzn2.0.8.x86_64
libgudev1-219-57.amzn2.0.8.x86_64
libgudev1-devel-219-57.amzn2.0.8.x86_64
systemd-journal-gateway-219-57.amzn2.0.8.x86_64
systemd-networkd-219-57.amzn2.0.8.x86_64
systemd-resolved-219-57.amzn2.0.8.x86_64
systemd-debuginfo-219-57.amzn2.0.8.x86_64