Business Logic Errors in Siemens SIMOTICS, Desigo, APOGEE, and TALON



Published: 2020-04-15
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-13939
CWE-ID CWE-840
Exploitation vector Local network
Public exploit N/A
Vulnerable software
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APOGEE MEC
Hardware solutions / Other hardware appliances

APOGEE MBC
Hardware solutions / Other hardware appliances

APOGEE PXC
Hardware solutions / Other hardware appliances

APOGEE PCX
Hardware solutions / Other hardware appliances

Desigo PXC
Hardware solutions / Other hardware appliances

Desigo PXM20
Hardware solutions / Other hardware appliances

SIMOTICS CONNECT 400
Hardware solutions / Other hardware appliances

TALON TC Series
Hardware solutions / Other hardware appliances

Vendor Siemens

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Business Logic Errors

EUVDB-ID: #VU26962

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-13939

CWE-ID: CWE-840 - Business Logic Errors (3.0)

Exploit availability: No

Description

The vulnerability allows a remote attacker to change the IP address of the device to an invalid value.

The vulnerability exists due to logical errors. A remote attacker on the local network can make device configuration changes and affect its availability.

This vulnerability affects the following products and versions:
  • APOGEE MEC/MBC/PXC (P2): All versions prior to 2.8.2
  • APOGEE PXC Series (BACnet): All versions, 3.0 and newer
  • APOGEE PCX Series (P2): All versions, 2.8.2 and newer
  • Desigo PXC (Power PC): All versions, 2.3x and newer
  • Desigo PXM20 (Power PC): All versions, 2.3x and newer
  • SIMOTICS CONNECT 400: All versions prior to 0.3.0.330
  • TALON TC Series (BACnet): All versions, 3.0 and newer

Mitigation

Install updates from vendor's website.

Vulnerable software versions

APOGEE MEC: before 2.8.2

APOGEE MBC: before 2.8.2

APOGEE PXC: before 2.8.2

APOGEE PCX: All versions

Desigo PXC: All versions

Desigo PXM20: All versions

SIMOTICS CONNECT 400: before 0.3.0.330

TALON TC Series: All versions

External links

http://cert-portal.siemens.com/productcert/pdf/ssa-162506.pdf


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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