#VU6190 Improper input validation in Siemens SIMATIC WinCC and SIMATIC PCS 7
Vulnerability identifier: #VU6190
Vulnerability risk: Critical
CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Siemens SIMATIC WinCC
Server applications /
SCADA systems
SIMATIC PCS 7
Server applications /
SCADA systems
Vendor: Siemens
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to improper input validation when processing packets sent to the WinCC server. A remote unauthenticated attacker can send a specially crafted packet and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Note: this vulnerability has been exploited in targeted attacks.
Mitigation
Install updates from vendor's website:
TIA Portal V13 (including WinCC Professional Runtime)
- Upgrade to WinCC V13 Update 6
http://support.automation.siemens.com/WW/view/de/90527654 (link is external)
WinCC 7.0
- Upgrade to WinCC 7.0 SP2 Update 11
http://support.automation.siemens.com/WW/view/en/107174184 (link is external)
WinCC V7.0 SP3
- Upgrade to WinCC 7.0 SP3 Update 7
http://support.automation.siemens.com/WW/view/en/109253830 (link is external)
WinCC 7.2
- Upgrade to WinCC 7.2 Update 9
http://support.automation.siemens.com/WW/view/en/104151435 (link is external)
WinCC 7.3
- Upgrade to WinCC 7.3 Update 2
http://support.automation.siemens.com/WW/view/en/105898606 (link is external)
PCS 7 V7.1 SP4
- Upgrade to WinCC 7.0 SP2 Update 11
http://support.automation.siemens.com/WW/view/en/107174184 (link is external) - Upgrade to OpenPCS 7 V7.1 SP4 Update 1
http://support.automation.siemens.com/WW/view/en/106226043 (link is external) - Upgrade to Route Control V7.1 SP2 Update 5
http://support.automation.siemens.com/WW/view/en/106226043 (link is external) - Upgrade to BATCH V7.1 SP1 Update 19
http://support.automation.siemens.com/WW/view/en/106226043 (link is external) - Upgrade to BATCH V7.1 SP2 Update 8
http://support.automation.siemens.com/WW/view/en/106226043 (link is external)
PCS 7 V8.0 SP2
- Upgrade to WinCC 7.2 Update 9
http://support.automation.siemens.com/WW/view/en/104151435 (link is external) - Upgrade to OpenPCS 7 V8.0 Update 5
http://support.automation.siemens.com/WW/view/en/106224418 (link is external) - Upgrade to Route Control V8.0 Update 4
http://support.automation.siemens.com/WW/view/en/106224418 (link is external) - Upgrade to BATCH V8.0 Update 11
http://support.automation.siemens.com/WW/view/en/106224418 (link is external)
PCS 7 V8.1
- Upgrade to WinCC 7.3 Update 2
http://support.automation.siemens.com/WW/view/de/105898606 (link is external) - Upgrade to OpenPCS 7 V8.1 Update 1
http://support.automation.siemens.com/WW/view/en/106226042 (link is external) - Upgrade to Route Control V8.1 Update 1
http://support.automation.siemens.com/WW/view/en/106226042 (link is external) - Upgrade to BATCH V8.1 Update 1
http://support.automation.siemens.com/WW/view/en/106226042 (link is external)
Vulnerable software versions
Siemens SIMATIC WinCC: 7.0 - 7.3 Update 1
SIMATIC PCS 7: 7.1 - 8.1
External links
http://ics-cert.us-cert.gov/advisories/ICSA-14-329-02D
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-134508.pdf
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
