Siemens SIMATIC HMI panel memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Siemens SIMATIC HMI panel (SCADA Software) (version now known). It has been rated as critical. This issue affects some unknown processing. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in HmiLoad in the runtime loader in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime, when Transfer Mode is enabled, allows remote attackers to execute arbitrary code via vectors related to Unicode strings.

The weakness was released 02/03/2012 by Luigi Auriemma (Website). The advisory is shared at The identification of this vulnerability is CVE-2011-4875 since 12/21/2011. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Luigi Auriemma and been published even before and not after the advisory. The exploit is available at It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 67 days. During that time the estimated underground price was around $25k-$100k.

The vulnerability is also documented in the databases at X-Force (71449), Exploit-DB (18166), SecurityFocus (BID 50828†) and OSVDB (77380†).






CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Luigi Auriemma
Download: 🔍

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Threat Intelligenceinfo

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Recommended: no mitigation known
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0-Day Time: 🔍


11/28/2011 🔍
11/28/2011 +0 days 🔍
11/28/2011 +0 days 🔍
12/21/2011 +23 days 🔍
02/03/2012 +44 days 🔍
02/03/2012 +0 days 🔍
03/23/2015 +1144 days 🔍
11/29/2021 +2443 days 🔍



Advisory: ssa-345442
Researcher: Luigi Auriemma
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4875 (🔍)
X-Force: 71449 - Siemens Simatic WinCC HmiLoad.exe buffer overflow
SecurityFocus: 50828 - Siemens SIMATIC WinCC Flexible Runtime 'HmiLoad.exe' Multiple Security Vulnerabilities
OSVDB: 77380

scip Labs:


Created: 03/23/2015 04:50 PM
Updated: 11/29/2021 01:16 PM
Changes: 03/23/2015 04:50 PM (54), 01/26/2018 08:14 AM (10), 11/29/2021 01:16 PM (2)
Complete: 🔍
Cache ID: 3:5A4:40


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