SUSE update for libeconf, shadow and util-linux

Published: 2022-04-19

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-3995 CVE-2021-3996
CWE-ID	CWE-264
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	SUSE Linux Enterprise Micro Operating systems & Components / Operating system login_defs Operating systems & Components / Operating system package or component util-linux-systemd Operating systems & Components / Operating system package or component util-linux-debugsource Operating systems & Components / Operating system package or component util-linux-debuginfo Operating systems & Components / Operating system package or component util-linux Operating systems & Components / Operating system package or component shadow-debugsource Operating systems & Components / Operating system package or component shadow-debuginfo Operating systems & Components / Operating system package or component shadow Operating systems & Components / Operating system package or component libuuid1-debuginfo Operating systems & Components / Operating system package or component libuuid1 Operating systems & Components / Operating system package or component libsmartcols1-debuginfo Operating systems & Components / Operating system package or component libsmartcols1 Operating systems & Components / Operating system package or component libmount1-debuginfo Operating systems & Components / Operating system package or component libmount1 Operating systems & Components / Operating system package or component libfdisk1-debuginfo Operating systems & Components / Operating system package or component libfdisk1 Operating systems & Components / Operating system package or component libblkid1-debuginfo Operating systems & Components / Operating system package or component libblkid1 Operating systems & Components / Operating system package or component util-linux-systemd-debugsource Operating systems & Components / Operating system package or component util-linux-systemd-debuginfo Operating systems & Components / Operating system package or component libeconf0-debuginfo Operating systems & Components / Operating system package or component libeconf0 Operating systems & Components / Operating system package or component libeconf-debugsource Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU60004

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3995

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to improper parsing of the /proc/self/mountinfo file in libmount. A local user can unmount other user's filesystems that are either world-writable themselves or mounted in a world-writable directory.

Mitigation

Update the affected package libeconf, shadow and util-linux to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro: 5.2

login_defs: before 4.8.1-150300.4.3.8

util-linux-systemd: before 2.36.2-150300.4.14.2

util-linux-debugsource: before 2.36.2-150300.4.14.3

util-linux-debuginfo: before 2.36.2-150300.4.14.3

util-linux: before 2.36.2-150300.4.14.3

shadow-debugsource: before 4.8.1-150300.4.3.8

shadow-debuginfo: before 4.8.1-150300.4.3.8

shadow: before 4.8.1-150300.4.3.8

libuuid1-debuginfo: before 2.36.2-150300.4.14.3

libuuid1: before 2.36.2-150300.4.14.3

libsmartcols1-debuginfo: before 2.36.2-150300.4.14.3

libsmartcols1: before 2.36.2-150300.4.14.3

libmount1-debuginfo: before 2.36.2-150300.4.14.3

libmount1: before 2.36.2-150300.4.14.3

libfdisk1-debuginfo: before 2.36.2-150300.4.14.3

libfdisk1: before 2.36.2-150300.4.14.3

libblkid1-debuginfo: before 2.36.2-150300.4.14.3

libblkid1: before 2.36.2-150300.4.14.3

util-linux-systemd-debugsource: before 2.36.2-150300.4.14.2

util-linux-systemd-debuginfo: before 2.36.2-150300.4.14.2

libeconf0-debuginfo: before 0.4.4+git20220104.962774f-150300.3.6.2

libeconf0: before 0.4.4+git20220104.962774f-150300.3.6.2

libeconf-debugsource: before 0.4.4+git20220104.962774f-150300.3.6.2

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20220727-2/

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.

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU60005