Multiple vulnerabilities in Siemens SIMATIC WinCC and SIMATIC PCS



Published: 2021-11-18
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-40358
CVE-2021-40359
CVE-2021-40364
CWE-ID CWE-22
CWE-532
Exploitation vector Network
Public exploit N/A
Vulnerable software
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SIMATIC PCS 7
Server applications / SCADA systems

Siemens SIMATIC WinCC
Server applications / SCADA systems

Vendor Siemens

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Path traversal

EUVDB-ID: #VU58235

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-40358

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote authenticated attacker can send a specially crafted HTTP request and read, write or delete critical files.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIMATIC PCS 7: 8.2 - 9.1

Siemens SIMATIC WinCC: 7.4 - 17


CPE2.3 External links

http://cert-portal.siemens.com/productcert/pdf/ssa-840188.pdf

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

2) Path traversal

EUVDB-ID: #VU58236

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-40359

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote authenticated attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIMATIC PCS 7: 8.2 - 9.1

Siemens SIMATIC WinCC: 7.4 - 17


CPE2.3 External links

http://cert-portal.siemens.com/productcert/pdf/ssa-840188.pdf

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

3) Inclusion of Sensitive Information in Log Files

EUVDB-ID: #VU58237

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-40364

CWE-ID: CWE-532 - Information Exposure Through Log Files

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to software stores sensitive information into log files. A local user can read the log files and gain access to sensitive data.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIMATIC PCS 7: 8.2 - 9.1

Siemens SIMATIC WinCC: 7.4 - 17


CPE2.3 External links

http://cert-portal.siemens.com/productcert/pdf/ssa-840188.pdf

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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