Siemens SIMATIC HMI panel input validation

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Siemens SIMATIC HMI panel. Affected is an unknown function. This manipulation causes input validation. This vulnerability appears as CVE-2011-4877. In addition, an exploit is available.

Detailsinfo

A vulnerability classified as critical was found in Siemens SIMATIC HMI panel (SCADA Software) (affected version unknown). Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

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 cause a denial of service (application crash) by sending crafted data over TCP.

The weakness was presented 02/03/2012 by Luigi Auriemma with ICS-CERT (Website). It is possible to read the advisory at us-cert.gov. This vulnerability is known as CVE-2011-4877 since 12/21/2011. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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. It is possible to download the exploit at exploit-db.com. 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 $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (72990), Exploit-DB (18166), SecurityFocus (BID 51836†), OSVDB (77380†) and Vulnerability Center (SBV-34794†). See VDB-60105, VDB-60104, VDB-60102 and VDB-60101 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.5
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/28/2011 🔍
11/28/2011 +0 days 🔍
12/21/2011 +23 days 🔍
02/02/2012 +43 days 🔍
02/03/2012 +1 days 🔍
02/03/2012 +0 days 🔍
02/03/2012 +0 days 🔍
04/03/2012 +60 days 🔍
03/23/2015 +1084 days 🔍
04/08/2025 +3669 days 🔍

Sourcesinfo

Vendor: siemens.com

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

CVE: CVE-2011-4877 (🔍)
GCVE (CVE): GCVE-0-2011-4877
GCVE (VulDB): GCVE-100-60103
X-Force: 72990
SecurityFocus: 51836 - Siemens SIMATIC WinCC HMI Web Server Multiple Input Validation Vulnerabilities
OSVDB: 77380
Vulnerability Center: 34794 - Multiple Siemens WinCC Products HmiLoad Remote DoS Vulnerability via Sending Crafted Data Over TCP, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 04/08/2025 12:09
Changes: 03/23/2015 16:50 (50), 04/10/2017 18:02 (19), 11/29/2021 13:27 (3), 04/08/2025 12:09 (14)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!