CVE-2017-6867 Denial of service in Siemens SIMATIC WinCC
Authenticated administrators can crash services in Siemens SIMATIC WinCC by sending crafted DCOM messages, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-6867?
CVE-2017-6867 is a medium-severity denial of service vulnerability in Siemens SIMATIC WinCC, published on 11 May 2017. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability was discovered in Siemens SIMATIC WinCC (V7.3 before Upd 11 and V7.4 before SP1), SIMATIC WinCC Runtime Professional (V13 before SP2 and V14 before SP1), SIMATIC WinCC (TIA Portal) Professional (V13 before SP2 and V14 before SP1) that could allow an authenticated, remote attacker who is member of the "administrators" group to crash services by sending specially crafted messages to the DCOM interface.
Which versions are affected by CVE-2017-6867?
It affects 3 products.
Products include Siemens Simatic Wincc, Siemens Simatic Wincc \(Tia Portal\), Siemens Simatic Wincc Runtime.
How do I fix CVE-2017-6867?
No fix has been published for CVE-2017-6867 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-6867 being exploited?
There is no known exploitation of CVE-2017-6867 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC WinCC
Sources
Also known as GHSA-f7g5-6g5q-8c2q.