# What is CVE-2019-10955? > CVE-2019-10955 is a medium-severity flaw (CVSS 6.1) in Compactlogix 5370 L1 from Rockwellautomation, published on 25 April 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 3.1%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2019-10955 ## 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:** 25 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 6.1 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:** 3.1% (latest exploit-likelihood forecast) - **Published:** 25 April 2019 - **Record last updated:** 10 February 2020 - **Main product:** Compactlogix 5370 L1 from Rockwellautomation - **Affected products:** 11 ## What is CVE-2019-10955? In plain terms It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can read some data and change some data. ### The official description In Rockwell Automation MicroLogix 1400 Controllers Series A, All Versions Series B, v15.002 and earlier, MicroLogix 1100 Controllers v14.00 and earlier, CompactLogix 5370 L1 controllers v30.014 and earlier, CompactLogix 5370 L2 controllers v30.014 and earlier, CompactLogix 5370 L3 controllers (includes CompactLogix GuardLogix controllers) v30.014 and earlier, an open redirect vulnerability could allow a remote unauthenticated attacker to input a malicious link to redirect users to a malicious site that could run or download arbitrary malware on the user’s machine. ### What kind of flaw is it? - CWE-601: URL Redirection to Untrusted Site ('Open Redirect') ### 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: Yes, a person has to take an action - What an attacker gets: Can read some data and change some data Severity vector: `CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N` ## Is CVE-2019-10955 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 3.1%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 3.1%, 3.1%, 3.1%, 3.1%, 3.1%, 3.1%, 3.1%. ### Timeline - 25 April 2019: Published - 10 February 2020: Record last updated ### How Precursor Intelligence ranks it CVE-2019-10955 scores **25 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-2019-10955? The published record lists 11 products. - [Compactlogix 5370 L1](https://www.precursorintelligence.com/product/rockwellautomation/compactlogix_5370_l1) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Hardware): version not specified - [Compactlogix 5370 L1 Firmware](https://www.precursorintelligence.com/product/rockwellautomation/compactlogix_5370_l1_firmware) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Operating system): up to 30.014 - [Compactlogix 5370 L2](https://www.precursorintelligence.com/product/rockwellautomation/compactlogix_5370_l2) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Hardware): version not specified - [Compactlogix 5370 L2 Firmware](https://www.precursorintelligence.com/product/rockwellautomation/compactlogix_5370_l2_firmware) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Operating system): up to 30.014 - [Compactlogix 5370 L3](https://www.precursorintelligence.com/product/rockwellautomation/compactlogix_5370_l3) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Hardware): version not specified - [Compactlogix 5370 L3 Firmware](https://www.precursorintelligence.com/product/rockwellautomation/compactlogix_5370_l3_firmware) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Operating system): up to 30.014 - [Micrologix 1100](https://www.precursorintelligence.com/product/rockwellautomation/micrologix_1100) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Hardware): version not specified - [Micrologix 1100 Firmware](https://www.precursorintelligence.com/product/rockwellautomation/micrologix_1100_firmware) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Operating system): up to 14.00 - [Micrologix 1400](https://www.precursorintelligence.com/product/rockwellautomation/micrologix_1400) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Hardware): version not specified - [Micrologix 1400 a Firmware](https://www.precursorintelligence.com/product/rockwellautomation/micrologix_1400_a_firmware) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Operating system): all versions - [Micrologix 1400 B Firmware](https://www.precursorintelligence.com/product/rockwellautomation/micrologix_1400_b_firmware) by [Rockwellautomation](https://www.precursorintelligence.com/vendors/rockwellautomation) (Operating system): up to 15.002 ## How do I fix CVE-2019-10955? 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 - [ics-cert.us-cert.gov](https://ics-cert.us-cert.gov/advisories/ICSA-19-113-01) (Government resource, Third-party advisory) - [securityfocus.com](https://www.securityfocus.com/bid/108049) (Third-party advisory, Vulnerability database) ## Questions ### What is CVE-2019-10955? CVE-2019-10955 is a medium-severity flaw in Compactlogix 5370 L1 from Rockwellautomation, published on 25 April 2019. It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can read some data and change some data. ### How serious is CVE-2019-10955? It scores 6.1 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2019-10955 is 25 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-2019-10955 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 3.1%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2019-10955 affect? For Compactlogix 5370 L1 from Rockwellautomation: version not specified. The record lists 11 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2019-10955? 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-2019-10955 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