SUSE update for systemd

1) Uncontrolled recursion

EUVDB-ID: #VU59358

Risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Clear]

CVE-ID: CVE-2021-3997

CWE-ID: CWE-674 - Uncontrolled Recursion

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to uncontrolled recursion in systemd-tmpfiles. A local user can create multiple nested directories in the /tmp folder and case systemd to crash during the system boot.

Mitigation

Update the affected package systemd to the latest version.

Vulnerable software versions

SUSE MicroOS: 5.1

SUSE Linux Enterprise Module for Basesystem: 15-SP3

systemd-lang: before 246.16-7.33.1

systemd-32bit-debuginfo: before 246.16-7.33.1

systemd-32bit: before 246.16-7.33.1

libudev1-32bit-debuginfo: before 246.16-7.33.1

libudev1-32bit: before 246.16-7.33.1

libsystemd0-32bit-debuginfo: before 246.16-7.33.1

libsystemd0-32bit: before 246.16-7.33.1

systemd-doc: before 246.16-7.33.1

systemd-devel: before 246.16-7.33.1

systemd-coredump-debuginfo: before 246.16-7.33.1

systemd-coredump: before 246.16-7.33.1

libudev-devel: before 246.16-7.33.1

udev-debuginfo: before 246.16-7.33.1

udev: before 246.16-7.33.1

systemd-sysvinit: before 246.16-7.33.1

systemd-journal-remote-debuginfo: before 246.16-7.33.1

systemd-journal-remote: before 246.16-7.33.1

systemd-debugsource: before 246.16-7.33.1

systemd-debuginfo: before 246.16-7.33.1

systemd-container-debuginfo: before 246.16-7.33.1

systemd-container: before 246.16-7.33.1

systemd: before 246.16-7.33.1

libudev1-debuginfo: before 246.16-7.33.1

libudev1: before 246.16-7.33.1

libsystemd0-debuginfo: before 246.16-7.33.1

libsystemd0: before 246.16-7.33.1

CPE2.3

• cpe:2.3:o:suse:suse_microos:5.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:a:suse:systemd-lang:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-32bit-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libudev1-32bit-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libudev1-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libsystemd0-32bit-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libsystemd0-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-doc:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-coredump-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-coredump:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libudev-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:udev-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:udev:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-sysvinit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-journal-remote-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-journal-remote:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-container-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd-container:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:systemd:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libudev1-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libudev1:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libsystemd0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libsystemd0:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20220043-1/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.