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Red Hat EL 7.1: RHSA-2017-0003-01 Moderate: Systemd Local DoS

red hat
Calendar Grey January 3, 2017
Scroller Redhat
Patch released for systemd in Red Hat Enterprise Linux 7.1 classified as moderate risk, resolving an issue that affects service operations.
An update for systemd is now available for Red Hat Enterprise Linux 7.1 Extended Update Support

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-2016-7796)

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux moderate severity service management systemd update local DoS issue

References

https://access.redhat.com/security/cve/CVE-2016-7796 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1):
Source: systemd-208-20.el7_1.9.src.rpm
x86_64: libgudev1-208-20.el7_1.9.i686.rpm libgudev1-208-20.el7_1.9.x86_64.rpm systemd-208-20.el7_1.9.x86_64.rpm systemd-debuginfo-208-20.el7_1.9.i686.rpm systemd-debuginfo-208-20.el7_1.9.x86_64.rpm systemd-libs-208-20.el7_1.9.i686.rpm systemd-libs-208-20.el7_1.9.x86_64.rpm systemd-python-208-20.el7_1.9.x86_64.rpm systemd-sysv-208-20.el7_1.9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1):
x86_64: libgudev1-devel-208-20.el7_1.9.i686.rpm libgudev1-devel-208-20.el7_1.9.x86_64.rpm systemd-debuginfo-208-20.el7_1.9.i686.rpm systemd-debuginfo-208-20.el7_1.9.x86_64.rpm systemd-devel-208-20.el7_1.9.i686.rpm systemd-devel-208-20.el7_1.9.x86_64.rpm systemd-journal-gateway-208-20.el7_1.9.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.1):
Source: systemd-208-20.el7_1.9.src.rpm
ppc64: libgudev1-208-20.el7_1.9.ppc.rpm libgudev1-208-20.el7_1.9.ppc64.rpm libgudev1-devel-208-20.el7_1.9.ppc.rpm libgudev1-devel-208-20.el7_1.9.ppc64.rpm systemd-208-20.el7_1.9.ppc64.rpm systemd-debuginfo-208-20.el7_1.9.ppc.rpm systemd-debuginfo-208-20.el7_1.9.ppc64.rpm systemd-devel-208-20.el7_1.9.ppc.rpm systemd-devel-208-20.el7_1.9.ppc64.rpm systemd-libs-208-20.el7_1.9.ppc.rpm

Read the Full Advisory


Advisory ID: RHSA-2017:0003-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0003.html
Issue date: 2017-01-03

Topic

An update for systemd is now available for Red Hat Enterprise Linux 7.1Extended Update Support.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 Red Hat Enterprise Linux moderate severity service management systemd update local DoS issue

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1381911 - CVE-2016-7796 systemd: freeze when PID 1 receives a zero-length message over notify socket

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