ASA-2019-00498 – Wind River VxWorks: Denial of Service (DoS) of TCP connection via malformed TCP options

Posted on by Allele Security Intelligence in Alerts

Allele Security Alert

ASA-2019-00498

Identifier(s)

ASA-2019-00498, CVE-2019-12258, V7NET-2426

Title

Denial of Service (DoS) of TCP connection via malformed TCP options

Vendor(s)

Wind River

Product(s)

Wind River VxWorks

Affected version(s)

Wind River VxWorks 6 version 6.6
Wind River VxWorks 6 version 6.7
Wind River VxWorks 6 version 6.8
Wind River VxWorks 6 versions 6.9.x before 6.9.4.12
Wind River VxWorks 7 versions 2.x.x.x before 2.1.0.0
Wind River VxWorks 7 versions 1.x.x.x before 1.4.3.1

Fixed version(s)

Wind River VxWorks 6 version 6.9.4.12
Wind River VxWorks 7 version 2.1.0.0
Wind River VxWorks 7 version 1.4.3.1

Proof of concept

Unknown

Description

A specially crafted packet containing illegal TCP-options can result in the victim not just dropping the TCP-segment but also drop the TCP-session.

This vulnerability affects established TCP sessions. An attacker who can figure out the source and destination TCP port and IP addresses of a session can inject invalid TCP segments into the flow, causing the TCP session to be reset. An application will see this as an ECONNRESET error message when using the socket after such an attack. The most likely outcome is a crash of the application reading from the affected socket.

Technical details

Unknown

Credits

Ben Seri (Armis)

Reference(s)

SECURITY ADVISORY: WIND RIVER TCP/IP STACK (IPNET) VULNERABILITIES
https://www.windriver.com/security/announcements/tcp-ip-network-stack-ipnet-urgent11/security-advisory-ipnet/security-advisory-ipnet.pdf

SECURITY VULNERABILITY RESPONSE INFORMATION – TCP/IP Network Stack (IPnet, Urgent/11)
https://www.windriver.com/security/announcements/tcp-ip-network-stack-ipnet-urgent11/

CVE: CVE-2019-12258 - Wind River Support Network
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12258

URGENT/11 Information from the Research Team – Armis Labs
https://armis.com/urgent11/

Critical vulnerabilities to remotely compromise VxWorks, the most popular RTOS
https://go.armis.com/hubfs/White-papers/Urgent11%20Technical%20White%20Paper.pdf

Critical Zero Days Remotely Compromise the Most Popular Real-Time OS
https://i.blackhat.com/USA-19/Thursday/us-19-Seri-Critical-Zero-Days-Remotely-Compromise-The-Most-Popular-Real-Time-OS.pdf

CVE-2019-12258
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12258

CVE-2019-12258
https://nvd.nist.gov/vuln/detail/CVE-2019-12258

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Last modified: August 12, 2019

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