# What is CVE-2017-14387? > CVE-2017-14387 is a medium-severity flaw (CVSS 6.5) in Isilon Onefs from Emc, published on 20 December 2017. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.9%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2017-14387 ## At a glance - **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle. - **Precursor Intelligence risk score:** 26 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 6.5 out of 10) - **Known to be exploited:** No, not on the list of flaws known to be exploited today - **Chance of use in the next 30 days:** 0.9% (latest exploit-likelihood forecast) - **Published:** 20 December 2017 - **Record last updated:** 20 April 2025 - **Main product:** Isilon Onefs from Emc - **Affected products:** 1 ## What is CVE-2017-14387? In plain terms It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data and change some data. ### The official description The NFS service in EMC Isilon OneFS 8.1.0.0, 8.0.1.0 - 8.0.1.1, and 8.0.0.0 - 8.0.0.4 maintains default NFS export settings (including the NFS export security flavor for authentication) that can be leveraged by current and future NFS exports. This NFS service contained a flaw that did not properly propagate changes made to the default security flavor to all new and existing NFS exports that are configured to use default NFS export settings and that are mounted after those changes are made. This flaw may potentially allow NFS clients to access affected NFS exports using the default and potentially weaker security flavor even if a more secure one was selected to be used by the OneFS administrator, aka an "NFS Export Security Setting Fallback Vulnerability." ### What kind of flaw is it? - Unknown: Unknown ### How an attack on it works - Where an attacker can be: Anywhere on the internet - How hard it is to pull off: Easy: no special conditions - Login needed first: No login needed - Does someone have to click: No, nobody has to do anything - What an attacker gets: Can read some data and change some data Severity vector: `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N` ## Is CVE-2017-14387 being exploited? Not that we know of It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.9%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.9%, 0.9%, 0.9%, 0.9%, 0.9%, 0.9%, 0.9%. ### Timeline - 20 December 2017: Published - 20 April 2025: Record last updated ### How Precursor Intelligence ranks it CVE-2017-14387 scores **26 out of 100 (Low)**, with the action "Monitor". Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less: - Evidence it is being exploited: biggest factor - How severe it is: strong factor - How widely exposed it is: smaller factor - Threat activity around it: smaller factor 85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it. ## Who is affected by CVE-2017-14387? The published record lists 1 product. - [Isilon Onefs](https://www.precursorintelligence.com/product/emc/isilon_onefs) by [Emc](https://www.precursorintelligence.com/vendors/emc) (Operating system): 8.0.0.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.1.0, 8.0.1.1, 8.1.0.0 ## How do I fix CVE-2017-14387? 1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list. 2. **Apply the vendor’s fix.** Install the latest update from the vendor. The references list where the vendor has published details. 3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in. 4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood. ### References - [seclists.org](http://seclists.org/fulldisclosure/2017/Dec/78) (Issue tracking, Mailing list, Third-party advisory) - [securityfocus.com](http://www.securityfocus.com/bid/102292) (Third-party advisory, Vulnerability database) ## Questions ### What is CVE-2017-14387? CVE-2017-14387 is a medium-severity flaw in Isilon Onefs from Emc, published on 20 December 2017. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can read some data and change some data. ### How serious is CVE-2017-14387? It scores 6.5 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2017-14387 is 26 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2017-14387 being exploited? It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.9%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2017-14387 affect? For Isilon Onefs from Emc: 8.0.0.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.1.0 and 2 more. ### How do I fix CVE-2017-14387? Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2017-14387 affect you? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact