CVE-2011-4508

Siemens Wincc Flexible < v11 - Authentication Bypass

Title source: rule

Description

The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.

References (2)

[Vendor Advisory] http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf

[US Government Resource] http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf

Scores

EPSS 0.0042

EPSS Percentile 61.5%

Classification

CWE

CWE-287

Status draft

Affected Products (16)

siemens/wincc_flexible

siemens/wincc < v11

siemens/wincc

siemens/simatic_hmi_panels

siemens/wincc_runtime_advanced

... and 1 more

Timeline

Published Feb 03, 2012

Tracked Since Feb 18, 2026