# What is CVE-2021-41057?

> CVE-2021-41057 is a high-severity flaw (CVSS 7.1) in Codemeter Runtime from Wibu, published on 14 November 2021. 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 0.3%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2021-41057

## 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:** 45 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** High (CVSS 7.1 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:** 0.3% (latest exploit-likelihood forecast)
- **Published:** 14 November 2021
- **Record last updated:** 17 November 2021
- **Main product:** Codemeter Runtime from Wibu
- **Affected products:** 11

## What is CVE-2021-41057? In plain terms

An attacker has to be already on the device with an ordinary user account, and nobody has to click anything. If it works, the attacker can change data and take it offline.

### The official description

In WIBU CodeMeter Runtime before 7.30a, creating a crafted CmDongles symbolic link will overwrite the linked file without checking permissions.

### What kind of flaw is it?

- CWE-59: Improper Link Resolution Before File Access ('Link Following')

### How an attack on it works

- Where an attacker can be: Already on the device
- How hard it is to pull off: Easy: no special conditions
- Login needed first: An ordinary user account
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can change data and take it offline

Severity vector: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`

## Is CVE-2021-41057 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 0.3%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%.

### Timeline

- 14 November 2021: Published
- 17 November 2021: Record last updated

### How Precursor Intelligence ranks it

CVE-2021-41057 scores **45 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-2021-41057?

The published record lists 11 products. Versions are as published: "before 7.30a" means every version up to, but not including, 7.30a.

- [Codemeter Runtime](https://www.precursorintelligence.com/product/wibu/codemeter_runtime) by [Wibu](https://www.precursorintelligence.com/vendors/wibu) (Application): before 7.30a
- [Simatic Information Server](https://www.precursorintelligence.com/product/siemens/simatic_information_server) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): before 2019, 2019, 2019-sp1
- [Pss E](https://www.precursorintelligence.com/product/siemens/pss_e) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): 34.0.0 to before 34.9.1, 35.0.0 to before 35.3.2
- [Pss Cape](https://www.precursorintelligence.com/product/siemens/pss_cape) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): 14
- [Pss Odms](https://www.precursorintelligence.com/product/siemens/pss_odms) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): before 12.2.6.1
- [Sicam 230](https://www.precursorintelligence.com/product/siemens/sicam_230) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): before 8.0
- [Simatic Pcs Neo](https://www.precursorintelligence.com/product/siemens/simatic_pcs_neo) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): all versions
- [Simatic Process Historian](https://www.precursorintelligence.com/product/siemens/simatic_process_historian) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): up to 2019
- [Simatic Wincc Oa](https://www.precursorintelligence.com/product/siemens/simatic_wincc_oa) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): up to 3.18
- [Simit](https://www.precursorintelligence.com/product/siemens/simit) by [Siemens](https://www.precursorintelligence.com/vendors/siemens) (Application): up to 10.0
- [Windows](https://www.precursorintelligence.com/product/microsoft/windows) by [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) (Operating system): version not specified

## How do I fix CVE-2021-41057?

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 advisories and patch notes 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

- [cdn.wibu.com](https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210910-01.pdf) (Mitigation, Vendor advisory)
- [wibu.com](https://www.wibu.com/us/support/security-advisories.html) (Vendor advisory)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/pdf/ssa-580693.pdf) (Third-party advisory)

## Questions

### What is CVE-2021-41057?

CVE-2021-41057 is a high-severity flaw in Codemeter Runtime from Wibu, published on 14 November 2021. An attacker has to be already on the device with an ordinary user account, and nobody has to click anything. If it works, the attacker can change data and take it offline.

### How serious is CVE-2021-41057?

It scores 7.1 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2021-41057 is 45 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-2021-41057 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 0.3%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2021-41057 affect?

For Codemeter Runtime from Wibu: before 7.30a. The record lists 11 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2021-41057?

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-2021-41057 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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