Buffer overflow in Emqx Nanomq

CVE-2023-34488

NanoMQ 0.17.5 has a one-byte heap-based buffer over-read in the conn_handler function of mqtt_parser.c when it processes malformed messages.

Vulnerability class: Buffer Overflow

EPSS: 0.005 (39.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Emqx Nanomq — versions 0.17.5
N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Patch, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-34488?: CVE-2023-34488 is a high-severity vulnerability in Emqx Nanomq, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-06-12.
How severe is CVE-2023-34488?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-34488 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.