10.0
CRITICAL
CVE-2011-4514
Siemens Simatic WinCC Telnet Authentication Bypass
Description

The TELNET daemon 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 does not perform authentication, which makes it easier for remote attackers to obtain access via a TCP session.

INFO

Published Date :

Feb. 3, 2012, 8:55 p.m.

Last Modified :

Feb. 6, 2012, 5 a.m.

Remotely Exploitable :

Yes !

Impact Score :

10.0

Exploitability Score :

10.0
Affected Products

The following products are affected by CVE-2011-4514 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Siemens wincc
2 Siemens wincc_flexible
3 Siemens simatic_hmi_panels
4 Siemens wincc_runtime_advanced
5 Siemens wincc_flexible_runtime
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2011-4514.

URL Resource
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf Vendor Advisory
http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf US Government Resource

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2011-4514 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2011-4514 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2011-4514 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.51 }} 0.10%

score

0.76791

percentile

CVSS2 - Vulnerability Scoring System
Access Vector
Access Complexity
Authentication
Confidentiality
Integrity
Availability