What’s Vulnerable › Vulnerabilities

CVE-2018-16603

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-06 · updated 2026-06-17
• Weakness: CWE-200

Description

An issue was discovered in Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and WITTENSTEIN WHIS Connect middleware TCP/IP component. Out of bounds access to TCP source and destination port fields in xProcessReceivedTCPPacket can leak data back to an attacker.

Affected products

• Amazon Web Services Freertos: through 1.3.1
• FreeRTOS-Kernel: through 10.0.1

References

• https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-details/
• https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-critical-infrastructure-systems/
• https://github.com/aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md
• https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-details/
• https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-critical-infrastructure-systems/
• https://github.com/aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md

Get alerted when CVE-2018-16603 or the next vulnerability affects your stack