SSA-417159

Siemens Security Advisory by Siemens ProductCERT

SSA-417159: Multiple Vulnerabilities in SINEMA Remote Connect Client Before V3.2 SP2

Publication Date:	2024-09-10
Last Update:	2024-09-10
Current Version:	V1.0
CVSS v3.1 Base Score:	9.8
CVSS v4.0 Base Score:	5.3

SUMMARY

SINEMA Remote Connect Client before V3.2 SP2 is affected by multiple vulnerabilities.

Siemens has released a new version for SINEMA Remote Connect Client and recommends to update to the latest version.

AFFECTED PRODUCTS AND SOLUTION

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Affected Product and Versions	Remediation
SINEMA Remote Connect Client All versions < V3.2 SP2 affected by all CVEs CVE-2023-46850 CVE-2024-2004 CVE-2024-2379 CVE-2024-2398 CVE-2024-2466 CVE-2024-32006 CVE-2024-42344	Update to V3.2 SP2 or later version https://support.industry.siemens.com/cs/ww/en/view/109974084/ See further recommendations from section Workarounds and Mitigations

WORKAROUNDS AND MITIGATIONS

Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:

CVE-2024-32006: Instead of using the TOTP-based two-factor authentication mechanism, consider login with Smartcard/User certificate

Product-specific remediations or mitigations can be found in the section Affected Products and Solution.
Please follow the General Security Recommendations.

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

SINEMA Remote Connect is a management platform for remote networks that enables the simple management of tunnel connections (VPN) between headquarters, service technicians, and installed machines or plants. It provides both the Remote Connect Server, which is the server application, and the Remote Connect Client, which is an OpenVPN client for optimal connection to SINEMA Remote Connect Server.

VULNERABILITY DESCRIPTION

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This chapter describes all vulnerabilities (CVE-IDs) addressed in this security advisory. Wherever applicable, it also documents the product-specific impact of the individual vulnerabilities.

Vulnerability CVE-2023-46850

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

CVSS v3.1 Base Score	9.8
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE	CWE-416: Use After Free

Vulnerability CVE-2024-2004

When a protocol selection parameter option disables all protocols without adding any then the default set of protocols would remain in the allowed set due to an error in the logic for removing protocols. The below command would perform a request to curl.se with a plaintext protocol which has been explicitly disabled. curl --proto -all,-http http://curl.se The flaw is only present if the set of selected protocols disables the entire set of available protocols, in itself a command with no practical use and therefore unlikely to be encountered in real situations. The curl security team has thus assessed this to be low severity bug.

CVSS v3.1 Base Score	5.3
CVSS v3.1 Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
CWE	CWE-20: Improper Input Validation

Vulnerability CVE-2024-2379

libcurl skips the certificate verification for a QUIC connection under certain conditions, when built to use wolfSSL. If told to use an unknown/bad cipher or curve, the error path accidentally skips the verification and returns OK, thus ignoring any certificate problems.

CVSS v3.1 Base Score	4.3
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
CWE	CWE-295: Improper Certificate Validation

Vulnerability CVE-2024-2398

When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead leaks the memory. Further, this error condition fails silently and is therefore not easily detected by an application.

CVSS v3.1 Base Score	7.5
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
CWE	CWE-772: Missing Release of Resource after Effective Lifetime

Vulnerability CVE-2024-2466

libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, when built to use mbedTLS. libcurl would wrongly avoid using the set hostname function when the specified hostname was given as an IP address, therefore completely skipping the certificate check. This affects all uses of TLS protocols (HTTPS, FTPS, IMAPS, POPS3, SMTPS, etc).

CVSS v3.1 Base Score	7.1
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N/E:P/RL:O/RC:C
CWE	CWE-297: Improper Validation of Certificate with Host Mismatch

Vulnerability CVE-2024-32006

The affected application does not expire the user session on reboot without logout. This could allow an attacker to bypass Multi-Factor Authentication.

CVSS v3.1 Base Score	4.3
CVSS v3.1 Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
CVSS v4.0 Base Score	5.3
CVSS v4.0 Vector	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE	CWE-613: Insufficient Session Expiration

Vulnerability CVE-2024-42344

The affected application inserts sensitive information into a log file which is readable by all legitimate users of the underlying system. This could allow an authenticated attacker to compromise the confidentiality of other users' configuration data.

CVSS v3.1 Base Score	4.4
CVSS v3.1 Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L/E:P/RL:O/RC:C
CVSS v4.0 Base Score	4.8
CVSS v4.0 Vector	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE	CWE-532: Insertion of Sensitive Information into Log File

ACKNOWLEDGMENTS

Siemens thanks the following party for its efforts:

Lloyd Post from DWG Automation for reporting the vulnerability CVE-2024-32006

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 (2024-09-10):

Publication Date

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