Siemens Clears Building Technologies Holes

Tuesday, April 3, 2018 @ 06:04 PM gHale

Siemens has a new version to mitigate multiple vulnerabilities in its building technologies products, according to a report with ICS-CERT.

The remotely exploitable vulnerabilities, discovered by Sergey Temnikov and Vladimir Dashchenko from Kaspersky Labs, are stack-based buffer overflow, external control of system or configuration setting, improper restriction of operations within the bounds of a memory buffer, NULL pointer dereference, XML entity expansion, heap-based buffer overflow and an improper access control.

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Successful exploitation of these vulnerabilities may allow arbitrary code execution, NTLM-relay attacks, remote code execution, denial of service, or increased attack surface.

Siemens License Management System (LMS), which includes a vulnerable version of Gemalto Sentinel LDK RTE, is used by the following Siemens products and solutions:
• License Management System (LMS) All versions prior to V2.1 SP3(2.1.670)

• Annual Shading V1.0.4 and 1.1

• Desigo ABT Versions
MP1.1 Build 845
MP1.15 Build 360
MP1.16 Build 055
MP1.2 Build 850
MP1.2.1 Build 318
MP2.1 Build 965

• Desigo CC Versions
MP1.1
MP2.0
MP2.1
MP3.0

• Desigo Configuration Manager (DCM) V6.10.140

• Desigo XWP
V5.00.204
V5.00.260
V5.10.142
V5.10.212
V6.00.184
V6.00.342
V6.10.172

• SiteIQ Analytics
V1.1
V1.2
V1.3

• Siveillance Identity V1.1

It would take an attacker with low skill level to leverage the vulnerabilities.

In one vulnerability, malformed ASN1 streams in V2C and similar input files can be used to generate stack-based buffer overflows. The vulnerability could allow arbitrary code execution.

CVE-2017-11496 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.8.

In addition, language packs containing malformed filenames could lead to a stack-based buffer overflow. The vulnerability could allow arbitrary code execution.

CVE-2017-11497 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.8.

Also, remote manipulation of the language pack updater could allow NTLM-relay attacks.

CVE-2017-12819 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.8.

There is also a memory corruption flaw that could allow remote code execution.

CVE-2017-12821 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.8.

In addition, zipped language packs with invalid HTML files could lead to NULL pointer access. The vulnerability could cause denial of service of the remote process.

CVE-2017-11498 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.5.

Also, a stack overflow flaw in the custom XML-parser could allow remote denial of service.

CVE-2017-12818 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.5,

Another vulnerability has an arbitrary memory read from controlled memory pointer that could allow remote denial of service.

CVE-2017-12820 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.5.

In addition, the administrative interface can be remotely enabled and disabled without authentication. This could increase the attack surface.

CVE-2017-12822 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 5.3.

The products see use mainly in the commercial facilities sector. The products also see action on a global basis.

Siemens said users should upgrade License Management System (LMS) to version 2.1 SP4 (2.1.681) or newer. To do so, users should contact the local Siemens representative or Siemens customer support.

Siemens recommends that users upgrade License Management System (LMS) to version 2.1 SP4 (2.1.681) or newer. To do so, users should follow these instructions or contact the local Siemens representative or Siemens customer support.

In addition, users with Desigo CC MP2.1 or older need to upgrade ALM Manager before applying the update to LMS.

Click here to view Siemens’ advisory.



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