Is CVE-2017-3737 automatically exploitable on my domain?

Not necessarily. ThreatPort treats CVE-2017-3737 as a risk signal that must be connected to observed external assets, detected technologies, and reachable services.

What does ThreatPort check for CVE-2017-3737?

ThreatPort looks for public asset evidence, service fingerprints, CVE-linked technology signals, exposed endpoints, weak DNS/TLS posture, and remediation context.

Should this replace vendor advisories?

No. Use vendor advisories and official patches for final remediation decisions; use ThreatPort to find externally visible exposure and prove cleanup.

CVE-2017-3737 Openssl exposure check

From CVE Record to External Exposure

OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SS...

Openssl vulnerability should be triaged by matching the affected vendor and product to live, internet-facing assets rather than treating the CVE as an abstract feed item. ThreatPort focuses on the first question that budget-constrained IT leaders and CISOs ask: what can an outside observer find today, how severe is it, and what should be fixed first?

Known Exploitation Record

Known ransomware campaign use: Not recorded
EPSS exploitation probability: 78.67% (100p)
CVSS base score: 5.9 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Disclosed: 2017-12-07
Weakness type: CWE-125, CWE-787

Source: CISA Known Exploited Vulnerabilities catalog and FIRST.org EPSS.

What ThreatPort Checks

Identify externally reachable services that appear related to Openssl Openssl.

Map detected technologies to CVE-2017-3737, severity context, and practical remediation priority.

Check TLS, DNS, headers, exposed panels, stale endpoints, and service fingerprints from a public attacker perspective.

Produce a concise scorecard first, then unlock deeper AI pentest evidence and PDF reporting when remediation planning begins.

The output is intentionally practical: ownership clues, risk context, remediation hints, and repeatable evidence that can be shared with technical teams or leadership. It is not positioned as magic compliance automation or a replacement for human security judgment.

Lean security teams rarely need another broad vulnerability list. They need to know whether an exposed endpoint, an expired certificate, a weak DNS setting, or a CVE-linked service is likely to affect the systems they actually run. ThreatPort scans from the outside in, ranks what it finds by real reachability rather than raw CVSS, and hands back evidence a team can act on the same day.

Route-Specific Evidence Profile

CVE-2017-3737 affects Openssl, a CWE-125 weakness. Disclosed 2017-12-07. This page exists to answer one question: is anything you own externally reachable and running it.

Assets This Page Should Care About

Public domains Subdomains Externally reachable web apps TLS endpoints DNS records

Signals Worth Prioritizing

Forgotten subdomains

Weak DNS or email controls

Outdated services

Risky headers

What Should Be Reviewed First in This Context?

For teams running Openssl, the first step is to validate internet-facing assets with business relevance instead of producing a generic vulnerability list.