# What is CVE-2019-13924?

> CVE-2019-13924 is a medium-severity flaw (CVSS 5.4) in Scalance X-200irt from Siemens, published on 11 February 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 0.8%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2019-13924

## 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:** 20 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 5.4 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:** 0.8% (latest exploit-likelihood forecast)
- **Published:** 11 February 2020
- **Record last updated:** 13 December 2022
- **Main product:** Scalance X-200irt from Siemens
- **Affected products:** 16

## What is CVE-2019-13924? 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

A vulnerability has been identified in SCALANCE S602 (All versions < V4.1), SCALANCE S612 (All versions < V4.1), SCALANCE S623 (All versions < V4.1), SCALANCE S627-2M (All versions < V4.1), SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < 5.2.4), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0), SCALANCE X-200RNA switch family (All versions < V3.2.7), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < 4.1.3). The device does not send the X-Frame-Option Header in the administrative web interface, which makes it vulnerable to Clickjacking attacks. The security vulnerability could be exploited by an attacker that is able to trick an administrative user with a valid session on the target device into clicking on a website controlled by the attacker. The vulnerability could allow an attacker to perform administrative actions via the web interface.

### What kind of flaw is it?

- CWE-693: Protection Mechanism Failure
- CWE-1021: Improper Restriction of Rendered UI Layers or Frames

### 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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N`

## Is CVE-2019-13924 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 0.8%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%, 0.8%.

### Timeline

- 11 February 2020: Published
- 13 December 2022: Record last updated

### How Precursor Intelligence ranks it

CVE-2019-13924 scores **20 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-2019-13924?

The published record lists 16 products. Versions are as published: "before 4.1.3" means every version up to, but not including, 4.1.3.

- [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): 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): before 4.1.3
- [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): before 5.2.4
- [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): before 5.2.4
- [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): before 5.2.4
- [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): before 5.2.4
- [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): before 4.1.3
- [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): before 4.1.3

## How do I fix CVE-2019-13924?

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-951513.pdf) (Vendor advisory)
- [us-cert.gov](https://www.us-cert.gov/ics/advisories/icsa-20-042-07)

## Questions

### What is CVE-2019-13924?

CVE-2019-13924 is a medium-severity flaw in Scalance X-200irt from Siemens, published on 11 February 2020. 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-2019-13924?

It scores 5.4 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2019-13924 is 20 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-2019-13924 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 0.8%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2019-13924 affect?

For Scalance X-200irt from Siemens: version not specified. The record lists 16 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2019-13924?

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-2019-13924 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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