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CVE-2017-1000458

29
FAUCET Score

CVE-2017-1000458 describes an out-of-bounds write vulnerability in Bro (now Zeek) versions prior to 2.5.2, specifically within its ContentLine analyzer. This critical flaw (CVSS 9.8) can be exploited remotely without authentication, allowing attackers to trigger a denial of service and potentially achieve further exploitation. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high severity warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
2.5.2CPE matchmatch criteria
cpe:2.3:a:bro:bro:2.5.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.27%
Probability of exploitation in next 30 days
EPSS Percentile
81.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0227 is in the 71st percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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