Rewterz Threat Advisory – Multiple Samba Server Vulnerabilities

Severity

High

Analysis Summary

CVE-2021-44141 

Samba could allow a remote authenticated attacker to obtain sensitive information. By querying a symlink inside the exported share using SMB1 with unix extensions turned on, an attacker could exploit this vulnerability to discover if a named or directory exists on the filesystem outside of the exported share.

CVE-2022-0336 

Samba could allow a remote authenticated attacker to bypass security restrictions, caused by a flaw in the validation process of adding service principals names (SPNs) to an account. By sending a specially-crafted request, an attacker could exploit this vulnerability to impersonate arbitrary services or cause a denial of service condition on the system.

Impact

• Information Disclosure
• Security Bypass

Affected Vendors

Samba

Affected Products

• Samba Samba 4.11.0
• Samba Samba 4.12.0
• Samba Samba 4.11.10
• Samba Samba 4.12.3
• Samba Samba 4.11.14
• Samba Samba 4.12.8
• Samba Samba 4.15.1
• Samba Samba 4.13.17
• Samba Samba 4.13.16
• Samba Samba 4.14
• Samba Samba 4.13
• Samba Samba 4.15
• Samba Samba 4.0.0
• Samba Samba 4.13.0
• Samba Samba 4.14.0
• Samba Samba 4.15.0

Remediation

Upgrade to the latest version of Samba, available from the Samba Web site.

CVE-2021-44141

CVE-2022-0336