SUSE update for shadow

1) Information disclosure

EUVDB-ID: #VU80801

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-4641

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to an error in gpasswd(1), which fails to clean memory properly. When asking for a new password, shadow-utils asks the password twice. If the password fails on the second attempt, shadow-utils fails in cleaning the buffer used to store the first entry. A local user with enough access can retrieve the password from the memory.

Mitigation

Update the affected package shadow to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.4

SUSE Linux Enterprise Micro: 5.4

shadow-debuginfo: before 4.8.1-150400.3.3.1

shadow: before 4.8.1-150400.3.3.1

shadow-debugsource: before 4.8.1-150400.3.3.1

login_defs: before 4.8.1-150400.3.3.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_micro_for_rancher:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_micro:5.4:*:*:*:*:*:*:*
• cpe:2.3:a:suse:shadow-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:shadow:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:shadow-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:login_defs:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20233591-1/

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.