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TITLE:
Siemens SIMATIC S7-1200 Controller Communication Replay and Denial of
Service

SECUNIA ADVISORY ID:
SA44961

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/44961/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=44961

RELEASE DATE:
2011-06-16

DISCUSS ADVISORY:
http://secunia.com/advisories/44961/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/44961/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=44961

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Two vulnerabilities have been reported in Siemens SIMATIC S7-1200,
which can be exploited by malicious people to disclose sensitive
information and cause a DoS (Denial of Service).

1) The engineering software sends unencrypted data to the
Programmable Logic Controllers (PLC), which can be exploited to
replay commands sent by the engineering software via e.g.
Man-in-the-Middle (MitM) attacks.

2) An unspecified error within the web server can be exploited to
cause a DoS. No further information is currently available.

The vulnerabilities are reported in firmware version 02.00.02. Other
versions may also be affected.

SOLUTION:
The vendor recommends to disable the web server. Reportedly, the
vulnerabilities will be fixed in an upcoming version.

PROVIDED AND/OR DISCOVERED BY:
Dillon Beresford, NSS Labs.

ORIGINAL ADVISORY:
Siemens:
http://support.automation.siemens.com/dnl/TY/TYzNTUxOQAA_50428932_Akt/Siemens_Security_Advisory_SSA-625789.pdf
http://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&lang=en&objid=50428932&caller=view

Dillon Beresford:
http://news.infracritical.com/pipermail/scadasec/2011-May/019934.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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