CVE-2020-15786 Auth bypass in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)
Remote attackers can brute-force passwords to gain unauthorized access to Sm@rt Server due to insufficient blocking of authentication attempts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-15786?
CVE-2020-15786 is a critical authentication bypass vulnerability in Siemens SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants), published on 9 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.
Weakness: CWE-307
Which versions are affected by CVE-2020-15786?
It affects 4 products.
Products include Siemens Simatic Hmi Basic Panels 2nd Generation Firmware, Siemens Simatic Hmi Comfort Panels Firmware, Siemens Simatic Hmi Mobile Panels Firmware, Siemens Simatic Hmi United Comfort Panels Firmware.
How do I fix CVE-2020-15786?
No fix has been published for CVE-2020-15786 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-15786 being exploited?
There is no known exploitation of CVE-2020-15786 in the wild and no public exploit code.
Sources
Also known as GHSA-9hp3-3v8x-gvhx.