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CVE-2018-20785

UnknownEPSS 0.47%

Last modified

CVE-2018-20785 is a vulnerability of currently unknown severity. Secure boot bypass and memory extraction can be achieved on Neato Botvac Connected 2.2.0 devices. During startup, the AM335x secure boot feature decrypts and executes firmware. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

Secure boot bypass and memory extraction can be achieved on Neato Botvac Connected 2.2.0 devices. During startup, the AM335x secure boot feature decrypts and executes firmware. Secure boot can be bypassed by starting with certain commands to the USB serial port. Although a power cycle occurs, this does not completely reset the chip: memory contents are still in place. Also, it restarts into a boot menu that enables XMODEM upload and execution of an unsigned QNX IFS system image, thereby completing the bypass of secure boot. Moreover, the attacker can craft custom IFS data and write it to unused memory to extract all memory contents that had previously been present. This includes the original firmware and sensitive information such as Wi-Fi credentials.

Metrics

EPSS Probability
0.47%

36.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
NeatoroboticsBotvac D4 Connected Firmware2.2.0
NeatoroboticsBotvac D6 Connected Firmware2.2.0
NeatoroboticsBotvac D5 Connected Firmware2.2.0
NeatoroboticsBotvac D7 Connected Firmware2.2.0
NeatoroboticsBotvac D3 Connected Firmware2.2.0
NeatoroboticsBotvac D3 Pro Connected Firmware2.2.0
NeatoroboticsBotvac Connected Firmware2.2.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-20785?
Secure boot bypass and memory extraction can be achieved on Neato Botvac Connected 2.2.0 devices. During startup, the AM335x secure boot feature decrypts and executes firmware. Secure boot can be bypassed by starting with certain commands to the USB serial port. Although a power cycle occurs, this does not completely reset the chip: memory contents are still in place. Also, it restarts into a boot menu that enables XMODEM upload and execution of an unsigned QNX IFS system image, thereby completing the bypass of secure boot. Moreover, the attacker can craft custom IFS data and write it to unused memory to extract all memory contents that had previously been present. This includes the original firmware and sensitive information such as Wi-Fi credentials.
How severe is CVE-2018-20785?
Severity scoring for CVE-2018-20785 is pending analysis. The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.
How do I fix CVE-2018-20785?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST