CVE-2018-4012

Name: CVE-2018-4012
Creator: NVD / NIST
Published: 2019-01-03T22:29:00.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.55%

Last modified Jun 17, 2026

CVE-2018-4012 is a vulnerability of currently unknown severity. An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. EPSS estimates a 2.55% chance of exploitation in the next 30 days.

Description

An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. An unauthenticated attacker could impersonate a remote BrightCloud server to trigger this vulnerability.

Metrics

EPSS Probability

2.55%

83.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Webroot	Brightcloud	All versions

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0683Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0683Exploit, Third Party Advisory

Timeline

Published: Jan 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-4012?

How severe is CVE-2018-4012?

Severity scoring for CVE-2018-4012 is pending analysis. The EPSS model estimates a 2.55% probability of exploitation in the next 30 days.

How do I fix CVE-2018-4012?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4012?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST