SUSE update for sendmail

1) UNIX symbolic link following

EUVDB-ID: #VU69301

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-31256

CWE-ID: CWE-61 - UNIX Symbolic Link (Symlink) Following

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a symlink following issue in a script called by the sendmail systemd service. A local user can create a specially crafted symbolic link to a critical file on the system and escalate privileges from mail to root.

Mitigation

Update the affected package sendmail to the latest version.

Vulnerable software versions

SUSE Enterprise Storage: 6 - 7.1

SUSE Manager Retail Branch Server: 4.1 - 4.3

SUSE Linux Enterprise Storage: 7.1

SUSE Linux Enterprise Module for Packagehub Subpackages: 15-SP3 - 15-SP4

SUSE Manager Server: 4.1 - 4.3

SUSE Manager Proxy: 4.1 - 4.3

SUSE Linux Enterprise Server for SAP: 15-SP1 - 15-SP2

SUSE Linux Enterprise Server: 15-LTSS - 15-SP4

SUSE Linux Enterprise Module for Basesystem: 15-SP3 - 15-SP4

SUSE Linux Enterprise High Performance Computing: 15-LTSS - 15-SP4

SUSE Linux Enterprise Desktop: 15-SP3 - 15-SP4

SUSE CaaS Platform: 4.0

openSUSE Leap: 15.3 - 15.4

SUSE Linux Enterprise Server for SAP Applications: 15-SP3 - 15-SP4

sendmail-starttls: before 8.15.2-150000.8.9.1

libmilter-doc: before 8.15.2-150000.8.9.1

sendmail-devel: before 8.15.2-150000.8.9.1

sendmail-debugsource: before 8.15.2-150000.8.9.1

sendmail-debuginfo: before 8.15.2-150000.8.9.1

sendmail: before 8.15.2-150000.8.9.1

rmail-debuginfo: before 8.15.2-150000.8.9.1

rmail: before 8.15.2-150000.8.9.1

libmilter1_0-debuginfo: before 8.15.2-150000.8.9.1

libmilter1_0: before 8.15.2-150000.8.9.1

CPE2.3

• cpe:2.3:o:suse:suse_enterprise_storage:6:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_enterprise_storage:7.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_storage:7.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_packagehub_subpackages:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_packagehub_subpackages:15-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_server:4.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_server:4.2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_proxy:4.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap:15-SP1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:15-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_desktop:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_caas_platform:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:suse:opensuse_leap:15.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:sendmail-starttls:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libmilter-doc:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:sendmail-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:sendmail-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:sendmail-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:sendmail:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:rmail-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:rmail:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libmilter1_0-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:o:suse:libmilter1_0:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20223899-1/

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.