Multiple vulnerabilities in Siemens SIMATIC WinCC Add-Ons

Published: 2018-01-19

Risk	High
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2017-11496 CVE-2017-11497 CVE-2017-11498
CWE-ID	CWE-121 CWE-476
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	SIMATIC WinCC Add-On SIPAPER IT MIS Server applications / SCADA systems SIMATIC WinCC Add-On SICEMENT IT MIS Server applications / SCADA systems SIMATIC WinCC Add-On PM-QUALITY Server applications / SCADA systems SIMATIC WinCC Add-On PM-OPEN TCP/IP Server applications / SCADA systems SIMATIC WinCC Add-On PM-OPEN PV02 Server applications / SCADA systems SIMATIC WinCC Add-On PM-OPEN PI Server applications / SCADA systems SIMATIC WinCC Add-On PM-OPEN IMPORT Server applications / SCADA systems SIMATIC WinCC Add-On PM-OPEN HOST-S Server applications / SCADA systems SIMATIC WinCC Add-On PM-OPEN EXPORT Server applications / SCADA systems SIMATIC WinCC Add-On PM-MAINT Server applications / SCADA systems SIMATIC WinCC Add-On PM-CONTROL Server applications / SCADA systems SIMATIC WinCC Add-On PM-ANALYZE Server applications / SCADA systems SIMATIC WinCC Add-On PM-AGENT Server applications / SCADA systems SIMATIC WinCC Add-On PI CONNECT AUDIT TRAIL Server applications / SCADA systems SIMATIC WinCC Add-On PI CONNECT ALARM Server applications / SCADA systems SIMATIC WinCC Add-On Historian CONNECT ALARM Server applications / SCADA systems
Vendor	Siemens

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Stack-based buffer overflow

EUVDB-ID: #VU10111

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11496

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to stack-based buffer overflow. A remote attacker can send malformed ASN1 streams in V2C and similar input files, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIMATIC WinCC Add-On SIPAPER IT MIS: All versions

SIMATIC WinCC Add-On SICEMENT IT MIS: All versions

SIMATIC WinCC Add-On PM-QUALITY: All versions

SIMATIC WinCC Add-On PM-OPEN TCP/IP: All versions

SIMATIC WinCC Add-On PM-OPEN PV02: All versions

SIMATIC WinCC Add-On PM-OPEN PI: All versions

SIMATIC WinCC Add-On PM-OPEN IMPORT: All versions

SIMATIC WinCC Add-On PM-OPEN HOST-S: All versions

SIMATIC WinCC Add-On PM-OPEN EXPORT: All versions

SIMATIC WinCC Add-On PM-MAINT: All versions

SIMATIC WinCC Add-On PM-CONTROL: All versions

SIMATIC WinCC Add-On PM-ANALYZE: All versions

SIMATIC WinCC Add-On PM-AGENT: All versions

SIMATIC WinCC Add-On PI CONNECT AUDIT TRAIL: All versions

SIMATIC WinCC Add-On PI CONNECT ALARM: All versions

SIMATIC WinCC Add-On Historian CONNECT ALARM: All versions

External links

http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-127490.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

2) Stack-based buffer overflow

EUVDB-ID: #VU10112

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11497

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to stack-based buffer overflow. A remote attacker can send language packs containing malformed filenames, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIMATIC WinCC Add-On SIPAPER IT MIS: All versions

SIMATIC WinCC Add-On SICEMENT IT MIS: All versions

SIMATIC WinCC Add-On PM-QUALITY: All versions

SIMATIC WinCC Add-On PM-OPEN TCP/IP: All versions

SIMATIC WinCC Add-On PM-OPEN PV02: All versions

SIMATIC WinCC Add-On PM-OPEN PI: All versions

SIMATIC WinCC Add-On PM-OPEN IMPORT: All versions

SIMATIC WinCC Add-On PM-OPEN HOST-S: All versions

SIMATIC WinCC Add-On PM-OPEN EXPORT: All versions

SIMATIC WinCC Add-On PM-MAINT: All versions

SIMATIC WinCC Add-On PM-CONTROL: All versions

SIMATIC WinCC Add-On PM-ANALYZE: All versions

SIMATIC WinCC Add-On PM-AGENT: All versions

SIMATIC WinCC Add-On PI CONNECT AUDIT TRAIL: All versions

SIMATIC WinCC Add-On PI CONNECT ALARM: All versions

SIMATIC WinCC Add-On Historian CONNECT ALARM: All versions

External links

http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-127490.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

3) Null pointer dereference

EUVDB-ID: #VU10113

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11498

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to insufficient validation of user-supplied input. A remote attacker can send language pack (ZIP file) with invalid HTML files, trigger NULL pointer dereference and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIMATIC WinCC Add-On SIPAPER IT MIS: All versions

SIMATIC WinCC Add-On SICEMENT IT MIS: All versions

SIMATIC WinCC Add-On PM-QUALITY: All versions

SIMATIC WinCC Add-On PM-OPEN TCP/IP: All versions

SIMATIC WinCC Add-On PM-OPEN PV02: All versions

SIMATIC WinCC Add-On PM-OPEN PI: All versions

SIMATIC WinCC Add-On PM-OPEN IMPORT: All versions

SIMATIC WinCC Add-On PM-OPEN HOST-S: All versions

SIMATIC WinCC Add-On PM-OPEN EXPORT: All versions

SIMATIC WinCC Add-On PM-MAINT: All versions

SIMATIC WinCC Add-On PM-CONTROL: All versions

SIMATIC WinCC Add-On PM-ANALYZE: All versions

SIMATIC WinCC Add-On PM-AGENT: All versions

SIMATIC WinCC Add-On PI CONNECT AUDIT TRAIL: All versions

SIMATIC WinCC Add-On PI CONNECT ALARM: All versions

SIMATIC WinCC Add-On Historian CONNECT ALARM: All versions

External links

http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-127490.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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