The manager_invoke_notify_message function in systemd 231 and earlier allows local users to cause a denial of service (assertion failure and PID 1 hang) via a zero-length message received over a notify socket.

According to the version of the systemd packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - The manager_invoke_notify_message function in systemd     231 and earlier allows local users to cause a denial of     service (assertion failure and PID 1 hang) via a     zero-length message received over a notify     socket.(CVE-2016-7795)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the systemd packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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.i1/4^CVE-2016-7795i1/4%0

  - systemd-tmpfiles in systemd before 237 attempts to     support ownership/permission changes on hardlinked     files even if the fs.protected_hardlinks sysctl is     turned off, which allows local users to bypass intended     access restrictions via vectors involving a hard link     to a file for which the user lacks write access, as     demonstrated by changing the ownership of the     /etc/passwd file.i1/4^CVE-2017-18078i1/4%0

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the systemd packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - systemd: Out-of-bounds heap write in systemd-networkd     dhcpv6 option handling (CVE-2018-15688)

  - systemd: stack overflow when calling syslog from a     command with long cmdline (CVE-2018-16864)

  - systemd: stack overflow when receiving many journald     entries (CVE-2018-16865)

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

  - systemd: Unsafe handling of hard links allowing     privilege escalation(CVE-2017-18078)

  - systemd: Out-of-bounds write in systemd-resolved due to     allocating too small buffer in     dns_packet_new(CVE-2017-9445)

  - systemd: memory leak in journald-server.c introduced by     fix for CVE-2018-16864 (CVE-2019-3815)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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.

Fix for crash on empty notification messages.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

From Red Hat Security Advisory 2016:2610 :

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 impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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)

An update for systemd is now available for Red Hat Enterprise Linux 7.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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#1375603)

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 impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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)

Fix for the empty notification message issue.

----

Fix for crash on empty notification message.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
135565	EulerOS 2.0 SP3 : systemd (EulerOS-SA-2020-1436)	Nessus	Huawei Local Security Checks	medium
123903	EulerOS Virtualization 2.5.4 : systemd (EulerOS-SA-2019-1217)	Nessus	Huawei Local Security Checks	high
123866	EulerOS Virtualization 2.5.3 : systemd (EulerOS-SA-2019-1180)	Nessus	Huawei Local Security Checks	high
122218	EulerOS 2.0 SP5 : systemd (EulerOS-SA-2019-1045)	Nessus	Huawei Local Security Checks	high
119062	EulerOS Virtualization 2.5.2 : systemd (EulerOS-SA-2018-1371)	Nessus	Huawei Local Security Checks	high
95862	Scientific Linux Security Update : systemd on SL7.x x86_64 (20161103)	Nessus	Scientific Linux Local Security Checks	medium
94830	Fedora 25 : systemd (2016-894abe29d2)	Nessus	Fedora Local Security Checks	medium
94726	Oracle Linux 7 : systemd (ELSA-2016-2610)	Nessus	Oracle Linux Local Security Checks	medium
94666	RHEL 7 : systemd (RHSA-2016:2694)	Nessus	Red Hat Local Security Checks	medium
94603	RHEL 7 : systemd (RHSA-2016:2610)	Nessus	Red Hat Local Security Checks	medium
93887	Fedora 24 : systemd (2016-c942ed0424)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2016-7795

medium

Tenable Plugins

medium

high

high

high

high

medium

medium

medium

medium

medium

medium