ASA-2019-00496 – Wind River VxWorks: Stack overflow in the parsing of IPv4 packets’ IP options

Posted on by Allele Security Intelligence in Alerts

Allele Security Alert

ASA-2019-00496

Identifier(s)

ASA-2019-00496, CVE-2019-12256, V7NET-2423

Title

Stack overflow in the parsing of IPv4 packets’ IP options

Vendor(s)

Wind River

Product(s)

Wind River VxWorks

Affected version(s)

Wind River VxWorks 6 version 6.9.3
Wind River VxWorks 6 version 6.9.4 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 IPv4 packet, containing invalid encoded SSRR/LSRR options, may cause call-stack overflow. No specific services beyond IPv4 protocol support is required.

Not affected by user-application code, this vulnerability resides in the IPv4 option parsing and may be triggered by IPv4 packets containing invalid options. The most likely outcome of triggering this defect is that the tNet0 task crashes. In the worst-case scenario, this vulnerability can potentially lead to RCE.

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-2019-12256 - Wind River Support Network
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12256

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-2019-12256
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12256

CVE-2019-12256
https://nvd.nist.gov/vuln/detail/CVE-2019-12256

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Last modified: August 14, 2019

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