#VU18656 Improper access control in Siemens SIMATIC WinCC and SIMATIC PCS 7
Vulnerability identifier: #VU18656
Vulnerability risk: High
CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:W/RC:C]
CVE-ID:
CWE-ID:
CWE-284
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 gain unauthorized access to sensitive information.
The vulnerability exists due to improper access restrictions when installations have not “Encrypted Communication” configured. A remote unauthenticated attacker with network access may be able to execute arbitrary code.
Mitigation
- Upgrade SIMATIC WinCC to v7.3 or newer.
- Upgrade SIMATIC PCS 7 to v8.1 or newer.
- Enable Encrypted Communications (some newer versions have this enabled by default).
- Apply defense-in-depth concepts.
Vulnerable software versions
Siemens SIMATIC WinCC: 5.0 - v11
SIMATIC PCS 7: 6.1 - 9.0
External links
http://www.securityfocus.com/bid/108398
http://cert-portal.siemens.com/productcert/pdf/ssa-705517.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?
No. We are not aware of malware exploiting this vulnerability.
