Buffer overflow in Webroot Brightcloud

CVE-2018-4012

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.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.4th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% 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-2018-4012: held from 0.025 to 0.025.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2018-4012?
CVE-2018-4012 is a critical-severity vulnerability in Webroot Brightcloud, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.0/10. Published 2019-01-03.
How severe is CVE-2018-4012?
Critical severity. CVSS v3 base score is 9.0 out of 10.