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CVE-2023-35818

6.8 · MEDIUM

An issue was discovered on Espressif ESP32 3.0 (ESP32_rev300 ROM) devices.

Published Jul 17, 2023EPSS 0.22%

Overview

CVE-2023-35818 is a medium-severity vulnerability. It was published on July 17, 2023 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered on Espressif ESP32 3.0 (ESP32_rev300 ROM) devices. An EMFI attack on ECO3 provides the attacker with a capability to influence the PC value at the CPU context level, regardless of Secure Boot and Flash Encryption status. By using this capability, the attacker can exploit another behavior in the chip to gain unauthorized access to the ROM download mode. Access to ROM download mode may be further exploited to read the encrypted flash content in cleartext format or execute stub code.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refespressif.comRefwww.espressif.com/sites/default/files/advisory_downloads/AR2023-005%20Security%20Advisory%20Concerning%20Bypassing%20Secure%20Boot%20and%20Flash%20Encryption%20Using%20EMFI%20EN.pdfRefespressif.comRefwww.espressif.com/sites/default/files/advisory_downloads/AR2023-005%20Security%20Advisory%20Concerning%20Bypassing%20Secure%20Boot%20and%20Flash%20Encryption%20Using%20EMFI%20EN.pdf

How CyberStrike helps

Frequently asked questions

What is CVE-2023-35818?

CVE-2023-35818 is a medium-severity vulnerability. It was published on July 17, 2023 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2023-35818?

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-35818?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-35818?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-35818 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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