A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service at boot time when too many nested directories are created in /tmp.

An update of the systemd package has been released.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by a vulnerability that has been acknowledged by the vendor but will not be patched.

  - systemd: Uncontrolled recursion in systemd-tmpfiles when removing files (CVE-2021-3997)

Note that Nessus has not tested for this issue but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The remote host is affected by the vulnerability described in GLSA-202305-15 (systemd: Multiple Vulnerabilities)

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

  - An off-by-one Error issue was discovered in Systemd in format_timespan() function of time-util.c. An     attacker could supply specific values for time and accuracy that leads to buffer overrun in     format_timespan(), leading to a Denial of Service. (CVE-2022-3821)

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-025 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

  - A vulnerability was found in systemd. This security flaw can cause a local information leak due to     systemd-coredump not respecting the fs.suid_dumpable kernel setting. (CVE-2022-4415)

  - systemd 250 and 251 allows local users to achieve a systemd-coredump deadlock by triggering a crash that     has a long backtrace. This occurs in parse_elf_object in shared/elf-util.c. The exploitation methodology     is to crash a binary calling the same function recursively, and put it in a deeply nested directory to     make its backtrace large enough to cause the deadlock. This must be done 16 times when MaxConnections=16     is set for the systemd/units/systemd-coredump.socket file. (CVE-2022-45873)

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 250.8-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2022-2022-219 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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

It is, therefore, affected by a vulnerability as referenced in the ALAS2022-2022-040 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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

It is, therefore, affected by a vulnerability as referenced in the ALAS2022-2022-052 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

Note that Nessus has not tested for this issue 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 installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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 :

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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.

The remote SUSE Linux SUSE15 host has packages installed that are affected by a vulnerability as referenced in the openSUSE-SU-2022:0539-1 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2022:0539-1 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5226-1 advisory.

    It was discovered that systemd-tmpfiles employed uncontrolled recursion when removing deeply nested     directory hierarchies. A local attacker could exploit this to cause systemd-tmpfiles to crash or have     other unspecified impacts.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

The remote SUSE Linux SUSE15 host has packages installed that are affected by a vulnerability as referenced in the openSUSE-SU-2022:0043-1 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2022:0043-1 advisory.

  - A flaw was found in systemd. An uncontrolled recursion in systemd-tmpfiles may lead to a denial of service     at boot time when too many nested directories are created in /tmp. (CVE-2021-3997)

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

ID	Name	Product	Family	Severity
203178	Photon OS 4.0: Systemd PHSA-2022-4.0-0145	Nessus	PhotonOS Local Security Checks	medium
199609	RHEL 8 : systemd (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
195801	RHEL 7 : systemd (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	high
175054	GLSA-202305-15 : systemd: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	medium
173143	Amazon Linux 2023 : systemd, systemd-container, systemd-devel (ALAS2023-2023-025)	Nessus	Amazon Linux Local Security Checks	medium
168589	Amazon Linux 2022 : systemd (ALAS2022-2022-219)	Nessus	Amazon Linux Local Security Checks	medium
164728	Amazon Linux 2022 : (ALAS2022-2022-040)	Nessus	Amazon Linux Local Security Checks	medium
164718	Amazon Linux 2022 : (ALAS2022-2022-052)	Nessus	Amazon Linux Local Security Checks	medium
163162	EulerOS Virtualization 2.10.1 : systemd (EulerOS-SA-2022-2067)	Nessus	Huawei Local Security Checks	medium
163150	EulerOS Virtualization 2.10.0 : systemd (EulerOS-SA-2022-2039)	Nessus	Huawei Local Security Checks	medium
160615	EulerOS Virtualization 2.9.1 : systemd (EulerOS-SA-2022-1615)	Nessus	Huawei Local Security Checks	medium
160607	EulerOS Virtualization 2.9.0 : systemd (EulerOS-SA-2022-1639)	Nessus	Huawei Local Security Checks	medium
159986	EulerOS 2.0 SP10 : systemd (EulerOS-SA-2022-1516)	Nessus	Huawei Local Security Checks	medium
159944	EulerOS 2.0 SP10 : systemd (EulerOS-SA-2022-1497)	Nessus	Huawei Local Security Checks	medium
159789	EulerOS 2.0 SP9 : systemd (EulerOS-SA-2022-1460)	Nessus	Huawei Local Security Checks	medium
159787	EulerOS 2.0 SP9 : systemd (EulerOS-SA-2022-1439)	Nessus	Huawei Local Security Checks	medium
158241	openSUSE 15 Security Update : systemd (openSUSE-SU-2022:0539-1)	Nessus	SuSE Local Security Checks	medium
158230	SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2022:0539-1)	Nessus	SuSE Local Security Checks	medium
156711	Ubuntu 20.04 LTS : systemd vulnerability (USN-5226-1)	Nessus	Ubuntu Local Security Checks	medium
156647	openSUSE 15 Security Update : systemd (openSUSE-SU-2022:0043-1)	Nessus	SuSE Local Security Checks	medium
156644	SUSE SLED15 / SLES15 Security Update : systemd (SUSE-SU-2022:0043-1)	Nessus	SuSE Local Security Checks	medium

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CVE-2021-3997

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