Use After Free in Embedthis Goahead

CVE-2019-5096

An exploitable code execution vulnerability exists in the processing of multi-part/form-data requests within the base GoAhead web server application in versions v5.0.1, v.4.1.1 and v3.6.5. A specially crafted HTTP request can lead to a use-after-free condition during the processing of this request that can be used to corrupt heap structures that could lead to full code execution. The request can be unauthenticated in the form of GET or POST requests, and does not require the requested resource to exist on the server.

Vulnerability class: Use-After-Free

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.670 (99.3th percentile), scored .

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2019-5096: held from 0.670 to 0.670.

EPSS over last 30 days · oldest: 0.670 · newest: 0.670 · change: 0.000

Affected products

  • Embedthis Goahead — versions 3.6.5, 4.1.1, 5.0.1
  • Embedthis — versions EmbedThis GoAhead Web Server v5.0.1 EmbedThis GoAhead Web Server v4.1.1 EmbedThis GoAhead Web Server v3.6.5

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-5096?
CVE-2019-5096 is a critical-severity vulnerability in Embedthis Goahead, classified under Use After Free. CVSS score: 9.8/10. Published 2019-12-03.
How severe is CVE-2019-5096?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-5096 known to be exploited?
8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.