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RedHat: RHSA-2016:2610-01 Moderate: systemd Local Attack Fix

red hat
Calendar Grey November 3, 2016
Scroller Redhat
Ubuntu's bulletin outlines an important safety patch for netplan that mitigates potential remote exploitation threats and resolves existing issues.
An update for systemd is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. In addition, it supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can also work as a drop-in replacement for sysvinit.
Security Fix(es):
* A flaw was found in the way systemd handled empty notification messages. A local attacker could use this flaw to make systemd freeze its execution, preventing further management of system services, system shutdown, or zombie process collection via systemd. (CVE-2016-7795)
Bug Fix(es):
* Previously, the udev device manager automatically enabled all memory banks on IBM z System installations. As a consequence, hot plug memory was enabled automatically, which was incorrect. With this update, system architecture checks have been added to the udev rules to address the problem. As a result, hot plug memory is no longer automatically enabled. (BZ#1381123)

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux moderate impact local attack systemd update

References

https://access.redhat.com/security/cve/CVE-2016-7795 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: systemd-219-30.el7_3.3.src.rpm
x86_64: libgudev1-219-30.el7_3.3.i686.rpm libgudev1-219-30.el7_3.3.x86_64.rpm systemd-219-30.el7_3.3.x86_64.rpm systemd-debuginfo-219-30.el7_3.3.i686.rpm systemd-debuginfo-219-30.el7_3.3.x86_64.rpm systemd-libs-219-30.el7_3.3.i686.rpm systemd-libs-219-30.el7_3.3.x86_64.rpm systemd-python-219-30.el7_3.3.x86_64.rpm systemd-sysv-219-30.el7_3.3.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: libgudev1-devel-219-30.el7_3.3.i686.rpm libgudev1-devel-219-30.el7_3.3.x86_64.rpm systemd-debuginfo-219-30.el7_3.3.i686.rpm systemd-debuginfo-219-30.el7_3.3.x86_64.rpm systemd-devel-219-30.el7_3.3.i686.rpm systemd-devel-219-30.el7_3.3.x86_64.rpm systemd-journal-gateway-219-30.el7_3.3.x86_64.rpm systemd-networkd-219-30.el7_3.3.x86_64.rpm systemd-resolved-219-30.el7_3.3.i686.rpm systemd-resolved-219-30.el7_3.3.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: systemd-219-30.el7_3.3.src.rpm
x86_64: libgudev1-219-30.el7_3.3.i686.rpm libgudev1-219-30.el7_3.3.x86_64.rpm systemd-219-30.el7_3.3.x86_64.rpm systemd-debuginfo-219-30.el7_3.3.i686.rpm systemd-debuginfo-219-30.el7_3.3.x86_64.rpm systemd-libs-219-30.el7_3.3.i686.rpm systemd-libs-219-30.el7_3.3.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2016:2610-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2610.html
Issue date: 2016-11-03

Topic

An update for systemd is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux moderate impact local attack systemd update

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1380286 - CVE-2016-7795 systemd: Assertion failure when PID 1 receives a zero-length message over notify socket

1380686 - systemctl show changes

1381123 - s390x standby memory automatically onlined after boot [rhel-7.3.z]

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