75495 : Beckhoff TwinCAT TCATSysSrv.exe Datagram Parsing Remote DoS
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Timeline

Disclosure Date
2011-09-14

Days of Exposure
23 days

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2011-3486" target="_blank">CVE</a>)</em> : Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of service via a crafted request to UDP port 48899, which triggers an out-of-bounds read.

Classification

Location: Remote / Network Access
Attack Type: Denial of Service
Impact: Loss of Availability
Solution: Patch / RCS
Exploit: Exploit Public
Disclosure: Vendor Verified, Uncoordinated Disclosure
OSVDB: SCADA

Solution

Currently, there are no known workarounds or upgrades to correct this issue. However, Beckhoff has released a patch to address this vulnerability.

Products

Unknown or Incomplete

References

Exploit Database: 17835
CVE ID: 2011-3486 (see also: NVD)
Secunia Advisory ID: 45981
ISS X-Force ID: 69765
Other Advisory URL: http://aluigi.altervista.org/adv/twincat_1-adv.txt
http://securityreason.com/securityalert/8380
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-3486
http://www.us-cert.gov/control_systems/pdf/ICS-11-279-04.pdf
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-256-06.pdf

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 5.0
Source: nvd.nist.gov | Generated: 2011-09-16 | Disagree?

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