# What is CVE-2019-19301?

> CVE-2019-19301 is a high-severity flaw (CVSS 7.5) in Simatic Cp 443-1 from Siemens, published on 14 April 2020. 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 1.4%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2019-19301

## 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 7.5 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:** 1.4% (latest exploit-likelihood forecast)
- **Published:** 14 April 2020
- **Record last updated:** 11 April 2023
- **Main product:** Simatic Cp 443-1 from Siemens
- **Affected products:** 26

## What is CVE-2019-19301? 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 vulnerability has been identified in SCALANCE X200-4P IRT, SCALANCE X201-3P IRT, SCALANCE X201-3P IRT PRO, SCALANCE X202-2IRT, SCALANCE X202-2P IRT, SCALANCE X202-2P IRT PRO, SCALANCE X204-2, SCALANCE X204-2FM, SCALANCE X204-2LD, SCALANCE X204-2LD TS, SCALANCE X204-2TS, SCALANCE X204IRT, SCALANCE X204IRT PRO, SCALANCE X206-1, SCALANCE X206-1LD, SCALANCE X208, SCALANCE X208PRO, SCALANCE X212-2, SCALANCE X212-2LD, SCALANCE X216, SCALANCE X224, SCALANCE X302-7 EEC (230V, coated), SCALANCE X302-7 EEC (230V), SCALANCE X302-7 EEC (24V, coated), SCALANCE X302-7 EEC (24V), SCALANCE X302-7 EEC (2x 230V, coated), SCALANCE X302-7 EEC (2x 230V), SCALANCE X302-7 EEC (2x 24V, coated), SCALANCE X302-7 EEC (2x 24V), SCALANCE X304-2FE, SCALANCE X306-1LD FE, SCALANCE X307-2 EEC (230V, coated), SCALANCE X307-2 EEC (230V), SCALANCE X307-2 EEC (24V, coated), SCALANCE X307-2 EEC (24V), SCALANCE X307-2 EEC (2x 230V, coated), SCALANCE X307-2 EEC (2x 230V), SCALANCE X307-2 EEC (2x 24V, coated), SCALANCE X307-2 EEC (2x 24V), SCALANCE X307-3, SCALANCE X307-3, SCALANCE X307-3LD, SCALANCE X307-3LD, SCALANCE X308-2, SCALANCE X308-2, SCALANCE X308-2LD, SCALANCE X308-2LD, SCALANCE X308-2LH, SCALANCE X308-2LH, SCALANCE X308-2LH+, SCALANCE X308-2LH+, SCALANCE X308-2M, SCALANCE X308-2M, SCALANCE X308-2M PoE, SCALANCE X308-2M PoE, SCALANCE X308-2M TS, SCALANCE X308-2M TS, SCALANCE X310, SCALANCE X310, SCALANCE X310FE, SCALANCE X310FE, SCALANCE X320-1 FE, SCALANCE X320-1-2LD FE, SCALANCE X408-2, SCALANCE XF201-3P IRT, SCALANCE XF202-2P IRT, SCALANCE XF204, SCALANCE XF204-2, SCALANCE XF204-2BA IRT, SCALANCE XF204IRT, SCALANCE XF206-1, SCALANCE XF208, SCALANCE XR324-12M (230V, ports on front), SCALANCE XR324-12M (230V, ports on front), SCALANCE XR324-12M (230V, ports on rear), SCALANCE XR324-12M (230V, ports on rear), SCALANCE XR324-12M (24V, ports on front), SCALANCE XR324-12M (24V, ports on front), SCALANCE XR324-12M (24V, ports on rear), SCALANCE XR324-12M (24V, ports on rear), SCALANCE XR324-12M TS (24V), SCALANCE XR324-12M TS (24V), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (24V, ports on front), SCALANCE XR324-4M EEC (24V, ports on front), SCALANCE XR324-4M EEC (24V, ports on rear), SCALANCE XR324-4M EEC (24V, ports on rear), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear), SCALANCE XR324-4M EEC (2x 24V, ports on front), SCALANCE XR324-4M EEC (2x 24V, ports on front), SCALANCE XR324-4M EEC (2x 24V, ports on rear), SCALANCE XR324-4M EEC (2x 24V, ports on rear), SCALANCE XR324-4M PoE (230V, ports on front), SCALANCE XR324-4M PoE (230V, ports on rear), SCALANCE XR324-4M PoE (24V, ports on front), SCALANCE XR324-4M PoE (24V, ports on rear), SCALANCE XR324-4M PoE TS (24V, ports on front), SIMATIC CP 343-1 Advanced, SIMATIC CP 442-1 RNA, SIMATIC CP 443-1, SIMATIC CP 443-1, SIMATIC CP 443-1 Advanced, SIMATIC CP 443-1 RNA, SIMATIC RF180C, SIMATIC RF182C, SIPLUS NET CP 343-1 Advanced, SIPLUS NET CP 443-1, SIPLUS NET CP 443-1 Advanced, SIPLUS NET SCALANCE X308-2. The VxWorks-based Profinet TCP Stack can be forced to make very expensive calls for every incoming packet which can lead to a denial of service.

### What kind of flaw is it?

- CWE-400: Uncontrolled Resource Consumption

### 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:N/A:H`

## Is CVE-2019-19301 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 1.4%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 1.4%, 1.4%, 1.4%, 1.4%, 1.4%, 1.4%, 1.4%.

### Timeline

- 14 April 2020: Published
- 11 April 2023: Record last updated

### How Precursor Intelligence ranks it

CVE-2019-19301 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-2019-19301?

The published record lists 26 products. Versions are as published: "before 5.5.0" means every version up to, but not including, 5.5.0.

- [Simatic Cp 443-1](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance X-200irt](https://www.precursorintelligence.com/product/siemens/scalance_x-200irt) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance X-200irt Firmware](https://www.precursorintelligence.com/product/siemens/scalance_x-200irt_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): before 5.5.0
- [Scalance X-200irt Pro](https://www.precursorintelligence.com/product/siemens/scalance_x-200irt_pro) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance X-200irt Pro Firmware](https://www.precursorintelligence.com/product/siemens/scalance_x-200irt_pro_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Scalance X-300](https://www.precursorintelligence.com/product/siemens/scalance_x-300) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance X-300 Firmware](https://www.precursorintelligence.com/product/siemens/scalance_x-300_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Scalance Xb-200](https://www.precursorintelligence.com/product/siemens/scalance_xb-200) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance Xb-200 Firmware](https://www.precursorintelligence.com/product/siemens/scalance_xb-200_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Scalance Xc-200](https://www.precursorintelligence.com/product/siemens/scalance_xc-200) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance Xc-200 Firmware](https://www.precursorintelligence.com/product/siemens/scalance_xc-200_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Scalance Xf-200](https://www.precursorintelligence.com/product/siemens/scalance_xf-200) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance Xf-200 Firmware](https://www.precursorintelligence.com/product/siemens/scalance_xf-200_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Scalance Xp-200](https://www.precursorintelligence.com/product/siemens/scalance_xp-200) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance Xp-200 Firmware](https://www.precursorintelligence.com/product/siemens/scalance_xp-200_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Scalance XR-300](https://www.precursorintelligence.com/product/siemens/scalance_xr-300) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance XR-300 Firmware](https://www.precursorintelligence.com/product/siemens/scalance_xr-300_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Scalance XR-300wg](https://www.precursorintelligence.com/product/siemens/scalance_xr-300wg) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Scalance XR-300wg Firmware](https://www.precursorintelligence.com/product/siemens/scalance_xr-300wg_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 443-1 Advanced](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1_advanced) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Cp 443-1 Advanced Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1_advanced_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Cp 443-1 Firmware](https://www.precursorintelligence.com/product/siemens/simatic_cp_443-1_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Rf180c](https://www.precursorintelligence.com/product/siemens/simatic_rf180c) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Rf180c Firmware](https://www.precursorintelligence.com/product/siemens/simatic_rf180c_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions
- [Simatic Rf182c](https://www.precursorintelligence.com/product/siemens/simatic_rf182c) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Hardware): version not specified
- [Simatic Rf182c Firmware](https://www.precursorintelligence.com/product/siemens/simatic_rf182c_firmware) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Operating system): all versions

## How do I fix CVE-2019-19301?

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

- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-102233.pdf) (Vendor advisory)

## Questions

### What is CVE-2019-19301?

CVE-2019-19301 is a high-severity flaw in Simatic Cp 443-1 from Siemens, published on 14 April 2020. 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-2019-19301?

It scores 7.5 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2019-19301 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-2019-19301 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 1.4%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2019-19301 affect?

For Simatic Cp 443-1 from Siemens: version not specified. The record lists 26 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2019-19301?

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-2019-19301 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.

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