CVE-2021-27386 is a vulnerability in Siemens Simatic Wincc Runtime Advanced
Published on May 12, 2021

A vulnerability has been identified in SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V15.1 Update 6), SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V16 Update 4), SIMATIC WinCC Runtime Advanced V15 (All versions < V15.1 Update 6), SIMATIC WinCC Runtime Advanced V16 (All versions < V16 Update 4), SINAMICS GH150 (All versions), SINAMICS GL150 (with option X30) (All versions), SINAMICS GM150 (with option X30) (All versions), SINAMICS SH150 (All versions), SINAMICS SL150 (All versions), SINAMICS SM120 (All versions), SINAMICS SM150 (All versions), SINAMICS SM150i (All versions). SmartVNC has a heap allocation leak vulnerability in the device layout handler on client side, which could result in a Denial-of-Service condition.

NVD

Weakness Type

What is a Memory Leak Vulnerability?

The software does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is often triggered by improper handling of malformed data or unexpectedly interrupted sessions. In some languages, developers are responsible for tracking memory allocation and releasing the memory. If there are no more pointers or references to the memory, then it can no longer be tracked and identified for release.

CVE-2021-27386 has been classified to as a Memory Leak vulnerability or weakness.

Products Associated with CVE-2021-27386

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2021-27386 are published in Siemens Simatic Wincc Runtime Advanced:

Siemens Simatic Wincc Runtime Advanced

Affected Versions

Siemens SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants):

Version All versions < V15.1 Update 6 is affected.

Siemens SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (incl. SIPLUS variants):

Version All versions < V16 Update 4 is affected.

Siemens SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants):

Version All versions < V15.1 Update 6 is affected.

Siemens SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants):

Version All versions < V16 Update 4 is affected.

Siemens SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F:

Version All versions < V15.1 Update 6 is affected.

Siemens SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F:

Version All versions < V16 Update 4 is affected.

Siemens SIMATIC WinCC Runtime Advanced V15:

Version All versions < V15.1 Update 6 is affected.

Siemens SIMATIC WinCC Runtime Advanced V16:

Version All versions < V16 Update 4 is affected.

Siemens SINAMICS GH150:

Version All versions is affected.

Siemens SINAMICS GL150 (with option X30):

Version All versions is affected.

Siemens SINAMICS GM150 (with option X30):

Version All versions is affected.

Siemens SINAMICS SH150:

Version All versions is affected.

Siemens SINAMICS SL150:

Version All versions is affected.

Siemens SINAMICS SM120:

Version All versions is affected.

Siemens SINAMICS SM150:

Version All versions is affected.

Siemens SINAMICS SM150i:

Version All versions is affected.

Exploit Probability

EPSS

0.44%

Percentile

62.59%