Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU59358
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3997
CWE-ID:
CWE-674 - Uncontrolled Recursion
Exploit availability: No
DescriptionThe 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.
Update the affected package systemd to the latest version.
Vulnerable software versionsSUSE 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
External linkshttp://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.