What is CVE-2017-1000458?

CVE-2017-1000458 is a critical-severity vulnerability in Bro, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-01-02.

How severe is CVE-2017-1000458?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Bro

CVE-2017-1000458

Bro before Bro v2.5.2 is vulnerable to an out of bounds write in the ContentLine analyzer allowing remote attackers to cause a denial of service (crash) and possibly other exploitation.

Vulnerability class: Buffer Overflow

Published 2018-01-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.9th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Bro — versions 2.5.2

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/bro/bro/commit/6c0f101a62489b1c5927b4ed63b0e1d37db40282 (Third Party Advisory)
bro-tracker.atlassian.net/browse/BIT-1856 (Third Party Advisory)

Frequently asked questions

What is CVE-2017-1000458?: CVE-2017-1000458 is a critical-severity vulnerability in Bro, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-01-02.
How severe is CVE-2017-1000458?: Critical severity. CVSS v3 base score is 9.8 out of 10.