In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the "allow_active" element rather than "allow_any".

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:1611 advisory.

  - In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment     before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to     set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using     the allow_active element rather than allow_any. (CVE-2019-3842)

  - systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed     by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were     intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082. (CVE-2020-13776)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of systemd installed on the remote host is prior to 219-78. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2022-1854 advisory.

  - In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment     before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to     set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using     the allow_active element rather than allow_any. (CVE-2019-3842)

  - An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW     packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An     attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server. (CVE-2020-13529)

  - systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed     by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were     intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082. (CVE-2020-13776)

  - A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function     and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for     the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream     object, causing the use-after-free when the reference is still used later. (CVE-2022-2526)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote NewStart CGSL host, running version MAIN 6.02, has systemd packages installed that are affected by multiple vulnerabilities:

  - An issue was discovered in button_open in login/logind-button.c in systemd before 243. When executing the     udevadm trigger command, a memory leak may occur. (CVE-2019-20386)

  - In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment     before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to     set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using     the allow_active element rather than allow_any. (CVE-2019-3842)

  - systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed     by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were     intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082. (CVE-2020-13776)

  - basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an     Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that     results in an operating system crash. (CVE-2021-33910)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:1611 advisory.

  - In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment     before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to     set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using     the allow_active element rather than allow_any. (CVE-2019-3842)

  - systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed     by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were     intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082. (CVE-2020-13776)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3900 advisory.

  - systemd: Spoofing of XDG_SEAT allows for actions to be checked against allow_active instead of     allow_any (CVE-2019-3842)

  - systemd: Mishandles numerical usernames beginning with decimal digits or 0x followed by hexadecimal digits     (CVE-2020-13776)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-1611 advisory.

  - In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment     before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to     set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using     the allow_active element rather than allow_any. (CVE-2019-3842)

  - systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed     by hex digits, as demonstrated by use of root privileges when privileges of the 0x0 user account were     intended. NOTE: this issue exists because of an incomplete fix for CVE-2017-1000082. (CVE-2020-13776)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:1611 advisory.

  - systemd: Spoofing of XDG_SEAT allows for actions to be checked against allow_active instead of     allow_any (CVE-2019-3842)

  - systemd: Mishandles numerical usernames beginning with decimal digits or 0x followed by hexadecimal digits     (CVE-2020-13776)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:1611 advisory.

  - systemd: Spoofing of XDG_SEAT allows for actions to be checked against allow_active instead of     allow_any (CVE-2019-3842)

  - systemd: Mishandles numerical usernames beginning with decimal digits or 0x followed by hexadecimal digits     (CVE-2020-13776)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the systemd packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - It was discovered that pam_systemd does not properly     sanitize the environment before using the XDG_SEAT     variable. It is possible for an attacker, in some     particular configurations, to set a XDG_SEAT     environment variable which allows for commands to be     checked against polkit policies using the     'allow_active' element rather than     'allow_any'.(CVE-2019-3842)

  - It has been discovered that systemd-tmpfiles mishandles     symbolic links present in non-terminal path components.
    In some configurations a local user could use this     vulnerability to get access to arbitrary files when the     systemd-tmpfiles command is run.(CVE-2018-6954)

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 :

  - It has been discovered that systemd-tmpfiles mishandles     symbolic links present in non-terminal path components.
    In some configurations a local user could use this     vulnerability to get access to arbitrary files when the     systemd-tmpfiles command is run.(CVE-2018-6954)

  - In systemd before v242-rc4, it was discovered that     pam_systemd does not properly sanitize the environment     before using the XDG_SEAT variable. It is possible for     an attacker, in some particular configurations, to set     a XDG_SEAT environment variable which allows for     commands to be checked against polkit policies using     the 'allow_active' element rather than     'allow_any'.(CVE-2019-3842)

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.

This update for systemd fixes the following issues :

Security issues fixed :

CVE-2019-3842: Fixed a privilege escalation in pam_systemd which could be exploited by a local user (bsc#1132348).

CVE-2019-6454: Fixed a denial of service via crafted D-Bus message (bsc#1125352).

CVE-2019-3843, CVE-2019-3844: Fixed a privilege escalation where services with DynamicUser could gain new privileges or create SUID/SGID binaries (bsc#1133506, bsc#1133509).

Non-security issued fixed: logind: fix killing of scopes (bsc#1125604)

namespace: make MountFlags=shared work again (bsc#1124122)

rules: load drivers only on 'add' events (bsc#1126056)

sysctl: Don't pass null directive argument to '%s' (bsc#1121563)

systemd-coredump: generate a stack trace of all core dumps and log into the journal (jsc#SLE-5933)

udevd: notify when max number value of children is reached only once per batch of events (bsc#1132400)

sd-bus: bump message queue size again (bsc#1132721)

Do not automatically online memory on s390x (bsc#1127557)

Removed sg.conf (bsc#1036463)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE 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 :

  - It was discovered that a systemd service that uses     DynamicUser property can get new privileges through the     execution of SUID binaries, which would allow a     cooperating process to create binaries owned by the     service transient group with the setgid bit set. A     local attacker may use this flaw to access resources     that will be owned by a potentially different service     in the future when the GID will be     recycled.(CVE-2019-3844)

  - It was discovered that a systemd service that uses     DynamicUser property can create a SUID/SGID binary that     would be allowed to run as the transient service     UID/GID even after the service is terminated. A local     attacker may use this flaw to access resources that     will be owned by a potentially different service in the     future when the UID/GID will be     recycled.(CVE-2019-3843)

  - In systemd before v242-rc4, it was discovered that     pam_systemd does not properly sanitize the environment     before using the XDG_SEAT variable. It is possible for     an attacker, in some particular configurations, to set     a XDG_SEAT environment variable which allows for     commands to be checked against polkit policies using     the 'allow_active' element rather than     'allow_any'.(CVE-2019-3842)

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

  - systemd: Spoofing of XDG_SEAT allows for actions to be     checked against 'allow_active' instead of     'allow_any'.(CVE-2019-3842)

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.

This update for systemd fixes the following issues :

Security issues fixed :

  - CVE-2018-6954: Fixed a vulnerability in the symlink     handling of systemd-tmpfiles which allowed a local user     to obtain ownership of arbitrary files (bsc#1080919).

  - CVE-2019-3842: Fixed a vulnerability in pam_systemd     which allowed a local user to escalate privileges     (bsc#1132348).

  - CVE-2019-6454: Fixed a denial of service caused by long     dbus messages (bsc#1125352).

Non-security issues fixed :

  - systemd-coredump: generate a stack trace of all core     dumps (jsc#SLE-5933)

  - udevd: notify when max number value of children is     reached only once per batch of events (bsc#1132400)

  - sd-bus: bump message queue size again (bsc#1132721)

  - core: only watch processes when it's really necessary     (bsc#955942 bsc#1128657)

  - rules: load drivers only on 'add' events (bsc#1126056)

  - sysctl: Don't pass null directive argument to '%s'     (bsc#1121563)

  - Do not automatically online memory on s390x     (bsc#1127557)

This update was imported from the SUSE:SLE-12-SP2:Update update project.

This update for systemd fixes the following issues :

Security issues fixed :

CVE-2018-6954: Fixed a vulnerability in the symlink handling of systemd-tmpfiles which allowed a local user to obtain ownership of arbitrary files (bsc#1080919).

CVE-2019-3842: Fixed a vulnerability in pam_systemd which allowed a local user to escalate privileges (bsc#1132348).

CVE-2019-6454: Fixed a denial of service caused by long dbus messages (bsc#1125352).

Non-security issues fixed: systemd-coredump: generate a stack trace of all core dumps (jsc#SLE-5933)

udevd: notify when max number value of children is reached only once per batch of events (bsc#1132400)

sd-bus: bump message queue size again (bsc#1132721)

core: only watch processes when it's really necessary (bsc#955942 bsc#1128657)

rules: load drivers only on 'add' events (bsc#1126056)

sysctl: Don't pass null directive argument to '%s' (bsc#1121563)

Do not automatically online memory on s390x (bsc#1127557)

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

An update of the systemd package has been released.

Backport more patches :

  - shared/install: Preserve escape characters for escaped     unit names (https://github.com/coreos/bugs/issues/2569)

  - timedate: fix emitted value when ntp client is     enabled/disabled (#1696586)

  - udev: run programs in the specified order (#1696784)

  - core: add Manager::honor_device_enumeration flag     (https://pagure.io/fedora-silverblue/issue/8)

  - Various fixes for systemd-networkd, systemd-portabled

  - Dbus policy fixes

  - Crash on systax error in sysusers (#1670679)

  - Do not unescape mount paths received from libmount

  - Some minor build fixes

No need to log out or reboot.

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.

Jann Horn discovered that pam_systemd created logind sessions using some parameters from the environment. A local attacker could exploit this in order to spoof the active session and gain additional PolicyKit privileges.

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

Jann Horn discovered that the PAM module in systemd insecurely uses the environment and lacks seat verification permitting spoofing an active session to PolicyKit. A remote attacker with SSH access can take advantage of this issue to gain PolicyKit privileges that are normally only granted to clients in an active session on the local console.

ID	Name	Product	Family	Severity
184771	Rocky Linux 8 : systemd (RLSA-2021:1611)	Nessus	Rocky Linux Local Security Checks	high
165993	Amazon Linux 2 : systemd (ALAS-2022-1854)	Nessus	Amazon Linux Local Security Checks	critical
160827	NewStart CGSL MAIN 6.02 : systemd Multiple Vulnerabilities (NS-SA-2022-0055)	Nessus	NewStart CGSL Local Security Checks	high
157711	AlmaLinux 8 : systemd (ALSA-2021:1611)	Nessus	Alma Linux Local Security Checks	high
154260	RHEL 8 : systemd (RHSA-2021:3900)	Nessus	Red Hat Local Security Checks	high
149954	Oracle Linux 8 : systemd (ELSA-2021-1611)	Nessus	Oracle Linux Local Security Checks	high
149774	CentOS 8 : systemd (CESA-2021:1611)	Nessus	CentOS Local Security Checks	high
149692	RHEL 8 : systemd (RHSA-2021:1611)	Nessus	Red Hat Local Security Checks	high
128926	EulerOS Virtualization for ARM 64 3.0.2.0 : systemd (EulerOS-SA-2019-1923)	Nessus	Huawei Local Security Checks	high
128100	EulerOS 2.0 SP5 : systemd (EulerOS-SA-2019-1808)	Nessus	Huawei Local Security Checks	high
126736	SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2019:1364-2)	Nessus	SuSE Local Security Checks	high
126288	EulerOS 2.0 SP8 : systemd (EulerOS-SA-2019-1661)	Nessus	Huawei Local Security Checks	high
125537	SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2019:1364-1)	Nessus	SuSE Local Security Checks	high
125526	EulerOS 2.0 SP3 : systemd (EulerOS-SA-2019-1599)	Nessus	Huawei Local Security Checks	high
125453	openSUSE Security Update : systemd (openSUSE-2019-1450)	Nessus	SuSE Local Security Checks	high
125244	SUSE SLED12 / SLES12 Security Update : systemd (SUSE-SU-2019:1265-1)	Nessus	SuSE Local Security Checks	high
125077	Photon OS 2.0: Systemd PHSA-2019-2.0-0153	Nessus	PhotonOS Local Security Checks	high
124867	Photon OS 1.0: Systemd PHSA-2019-1.0-0228	Nessus	PhotonOS Local Security Checks	high
124630	EulerOS 2.0 SP2 : systemd (EulerOS-SA-2019-1344)	Nessus	Huawei Local Security Checks	high
124488	Fedora 30 : systemd (2019-3fa5db9e19)	Nessus	Fedora Local Security Checks	high
123930	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : systemd vulnerability (USN-3938-1)	Nessus	Ubuntu Local Security Checks	high
123836	Debian DSA-4428-1 : systemd - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2019-3842

high

Tenable Plugins

high

critical

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high