What is CVE-2023-34188?

CVE-2023-34188 is a high-severity vulnerability in Cesanta Mongoose, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2023-06-23.

How severe is CVE-2023-34188?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-34188 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Cesanta Mongoose

CVE-2023-34188

The HTTP server in Mongoose before 7.10 accepts requests containing negative Content-Length headers. By sending a single attack payload over TCP, an attacker can cause an infinite loop in which the server continuously reparses that payload, and does not respond to any other requests.

EPSS: 0.010 (59.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Cesanta Mongoose
N/a — versions n/a

Weakness classification (CWE)

CWE-1284 — Improper Validation of Specified Quantity in Input

Public proof-of-concept exploits

narfindustries/http-garden

References

Frequently asked questions

What is CVE-2023-34188?: CVE-2023-34188 is a high-severity vulnerability in Cesanta Mongoose, classified under Improper Validation of Specified Quantity in Input. CVSS score: 7.5/10. Published 2023-06-23.
How severe is CVE-2023-34188?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-34188 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.