Improper access control in Siemens SIMATIC WinCC
| Risk | High |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-10922 |
| CWE-ID | CWE-284 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Siemens SIMATIC WinCC Server applications / SCADA systems SIMATIC PCS 7 Server applications / SCADA systems |
| Vendor | Siemens |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Improper access control
EUVDB-ID: #VU18656
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2019-10922
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe 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: v11 - 15 Update 4
SIMATIC PCS 7: 6.1 - 9.0
CPE2.3- cpe:2.3:a:siemens:siemens_simatic_wincc:v11:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:siemens_simatic_wincc:5.0:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:siemens_simatic_wincc:6.0:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_pcs_7:6.1:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_pcs_7:7.1 SP1:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_pcs_7:7.1 SP2:*:*:*:*:*:*:*
https://www.securityfocus.com/bid/108398
https://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.
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.
