CVE-2023-4259 — Two potential buffer overflow vulnerabilities at the following locations in the

Two potential buffer overflow vulnerabilities at the following locations in the Zephyr eS-WiFi driver source code.

01What is this vulnerability?

Two potential buffer overflow vulnerabilities at the following locations in the Zephyr eS-WiFi driver source code.

02Affected products

Vendor	Product	Versions
zephyrproject-rtos	Zephyr	1.14

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-09-25T23:05:40.753Z
• Last modified: 2025-02-13T17:09:28.288Z

09References

• github.com — https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-gghm-c696-…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2023/11/07/1
• seclists.org — http://seclists.org/fulldisclosure/2023/Nov/1
• packetstormsecurity.com — http://packetstormsecurity.com/files/175657/Zephyr-RTOS-3.x.0-Buffer-Overflows.h…