# What is CVE-2019-6820? > CVE-2019-6820 is a high-severity flaw (CVSS 8.2) in Atv Imc Drive Controller from Schneider-Electric, published on 22 May 2019. 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 1.3%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2019-6820 ## 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:** 47 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes. - **Severity:** High (CVSS 8.2 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:** 1.3% (latest exploit-likelihood forecast) - **Published:** 22 May 2019 - **Record last updated:** 3 February 2022 - **Main product:** Atv Imc Drive Controller from Schneider-Electric - **Affected products:** 24 ## What is CVE-2019-6820? 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 take it offline. ### The official description A CWE-306: Missing Authentication for Critical Function vulnerability exists which could cause a modification of device IP configuration (IP address, network mask and gateway IP address) when a specific Ethernet frame is received in all versions of: Modicon M100, Modicon M200, Modicon M221, ATV IMC drive controller, Modicon M241, Modicon M251, Modicon M258, Modicon LMC058, Modicon LMC078, PacDrive Eco ,PacDrive Pro, PacDrive Pro2 ### What kind of flaw is it? - CWE-306: Missing Authentication for Critical Function ### 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 take it offline Severity vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H` ## Is CVE-2019-6820 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 1.3%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 1.3%, 1.3%, 1.3%, 1.3%, 1.3%, 1.3%, 1.3%. ### Timeline - 22 May 2019: Published - 3 February 2022: Record last updated ### How Precursor Intelligence ranks it CVE-2019-6820 scores **47 out of 100 (Medium)**, with the action "Plan remediation". 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-2019-6820? The published record lists 24 products. - [Atv Imc Drive Controller](https://www.precursorintelligence.com/product/schneider-electric/atv_imc_drive_controller) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Atv Imc Drive Controller Firmware](https://www.precursorintelligence.com/product/schneider-electric/atv_imc_drive_controller_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon Lmc058](https://www.precursorintelligence.com/product/schneider-electric/modicon_lmc058) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon Lmc058 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_lmc058_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon Lmc078](https://www.precursorintelligence.com/product/schneider-electric/modicon_lmc078) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon Lmc078 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_lmc078_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon M100](https://www.precursorintelligence.com/product/schneider-electric/modicon_m100) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon M100 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m100_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon M200](https://www.precursorintelligence.com/product/schneider-electric/modicon_m200) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon M200 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m200_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon M221](https://www.precursorintelligence.com/product/schneider-electric/modicon_m221) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon M221 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m221_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon M241](https://www.precursorintelligence.com/product/schneider-electric/modicon_m241) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon M241 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m241_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon M251](https://www.precursorintelligence.com/product/schneider-electric/modicon_m251) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon M251 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m251_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Modicon M258](https://www.precursorintelligence.com/product/schneider-electric/modicon_m258) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Modicon M258 Firmware](https://www.precursorintelligence.com/product/schneider-electric/modicon_m258_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Pacdrive Eco](https://www.precursorintelligence.com/product/schneider-electric/pacdrive_eco) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Pacdrive Eco Firmware](https://www.precursorintelligence.com/product/schneider-electric/pacdrive_eco_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Pacdrive Pro](https://www.precursorintelligence.com/product/schneider-electric/pacdrive_pro) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Pacdrive Pro Firmware](https://www.precursorintelligence.com/product/schneider-electric/pacdrive_pro_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions - [Pacdrive Pro2](https://www.precursorintelligence.com/product/schneider-electric/pacdrive_pro2) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Hardware): version not specified - [Pacdrive Pro2 Firmware](https://www.precursorintelligence.com/product/schneider-electric/pacdrive_pro2_firmware) by [Schneider-Electric](https://www.precursorintelligence.com/vendors/schneider-electric) (Operating system): all versions ## How do I fix CVE-2019-6820? 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 update named in the vendor’s advisory. We’ve put the advisory first in the list. 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 - [schneider-electric.com](https://www.schneider-electric.com/en/download/document/SEVD-2019-134-02/) (Vendor advisory) ## Questions ### What is CVE-2019-6820? CVE-2019-6820 is a high-severity flaw in Atv Imc Drive Controller from Schneider-Electric, published on 22 May 2019. It can be attacked from anywhere on the internet without logging in, and nobody has to click anything. If it works, the attacker can take it offline. ### How serious is CVE-2019-6820? It scores 8.2 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2019-6820 is 47 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle. ### Is CVE-2019-6820 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 1.3%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2019-6820 affect? For Atv Imc Drive Controller from Schneider-Electric: version not specified. The record lists 24 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2019-6820? Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet. ## Does CVE-2019-6820 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