-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 # SSA-337210: Privilege Escalation Vulnerability in SINUMERIK MC Publication Date: 2022-03-08 Last Update: 2022-03-08 Current Version: 1.0 CVSS v3.1 Base Score: 7.8 SUMMARY ======= The NC plug-in card in SINUMERIK MC contains a privilege escalation vulnerability that could allow local attackers to escalate their privileges to root. This allows full access to the device, including read and modifying G code. Siemens has released updates for the affected products and recommends to update to the latest versions. AFFECTED PRODUCTS AND SOLUTION ============================== * SINUMERIK MC - Affected versions: All versions < V1.15 SP1 - Remediation: Update to V1.15 SP1 or laterj version - Download: SINUMERIK software can be obtained from your local Siemens account manager. * SINUMERIK ONE - Affected versions: All versions < V6.15 SP1 - Remediation: Update to V6.15 SP1 or later version - Download: SINUMERIK software can be obtained from your local Siemens account manager. WORKAROUNDS AND MITIGATIONS =========================== Siemens has not identified any additional specific workarounds or mitigations. Please follow the "General Security Recommendations". Product specific mitigations can be found in the section "Affected Products and Solution". GENERAL SECURITY RECOMMENDATIONS ================================ As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity PRODUCT DESCRIPTION =================== SINUMERIK MC is a CNC system for customized machine solutions. SINUMERIK ONE is a digital-native CNC system. VULNERABILITY CLASSIFICATION ============================ The vulnerability classification has been performed by using the CVSS scoring system in version 3.1 (CVSS v3.1) (https://www.first.org/cvss/). The CVSS environmental score is specific to the customer's environment and will impact the overall CVSS score. The environmental score should therefore be individually defined by the customer to accomplish final scoring. An additional classification has been performed using the CWE classification, a community-developed list of common software security weaknesses. This serves as a common language and as a baseline for weakness identification, mitigation, and prevention efforts. A detailed list of CWE classes can be found at: https://cwe.mitre.org/. * Vulnerability CVE-2022-24408 The sc SUID binary on affected devices provides several commands that are used to execute system commands or modify system files. A specific set of operations using sc could allow local attackers to escalate their privileges to root. CVSS v3.1 Base Score: 7.8 CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C CWE: CWE-269: Improper Privilege Management ADDITIONAL INFORMATION ====================== For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories HISTORY DATA ============ V1.0 (2022-03-08): Publication Date TERMS OF USE ============ Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use. -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEHyx/myPwjH9jB9tDlm7gTEmyujQFAmImnIAACgkQlm7gTEmy ujQZpBAAj6CAkneKL1oXGUTtYQSJU1IPi7pF61mk9B5m3JEWhbFGbm80iAQogwpe vcr88zrubl/0rBE0a4Qjc/pyDNVGckxHAUv3Nl378B/atGhs8teBOesOvydTL4H5 jyteWxTvRvH0mgyM/y0oYS4fibqwGsOzMMN9XAg6XrHWyJdURtca90/abDTAST0z vLKnlQRuPWHPEOO3Ee2X4O6Y9kwSn7pSjCA5yINDsGWWEw+L+H4q5n4/Y0+LRDFd eu/lJBfMgnRKagoPW1Si8q6ua1BQp+jJvcJJdBE/lPjCrxm3GZKhDqbS6NaKVYf5 uOdTlIqoVHXD4NmSWGVH5ybsRdFzbGpoeFQ9PDtSVViQrcijQ79+GyAPYwXyzX+O pGNk+EEZRLfCK4CWCXiVl24p7oZ9A5GGBZOs9auHOWaNWrzxqWIInB1/4NwrecRu DFiIa00VMt6c8G+wjxKjZr/H+256QPzdIoVrVB1p88p+o65qGycXyl61XGiMVPfj vqx3jdPLCs+z0vQohSEyc8hraFYX1O+CZVCQywyaNbhAgt1UI4rklIJ0HvOsZtnJ xATXFA5dFFBGXufRvMqrMEqm3S93mSlklszpntz4QQ68OoVsUCePJMYoFz2N0Hje /hKjLbCGzU7L4rFK3smaSrhWsBekCYRyoZX1W/LTsQm4dLzdmdE= =zcmV -----END PGP SIGNATURE-----