Desigo DXR2: Improper Restriction of Excessive Authentication Attempts
CVE-2022-24044 is a high-severity improper restriction of excessive authentication attempts vulnerability in Desigo DXR2 from Siemens, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Desigo DXR2 versions: All versions < V01.21.142.5-22. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.9% chance of exploitation within 30 days, higher than 60% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Desigo Dxr2 Firmware to 01.21.142.5-22 or a later version.
- Update Desigo Pxc3 Firmware to 01.21.142.4-18 or a later version.
- Update Desigo Pxc4 Firmware to 02.20.142.10-10884 or a later version.
- Read the advisory on cert-portal.siemens.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Siemens | Desigo DXR2 | All versions < V01.21.142.5-22 | Not stated |
| Siemens | Desigo PXC3 | All versions < V01.21.142.4-18 | Not stated |
| Siemens | Desigo PXC4 | All versions < V02.20.142.10-10884 | Not stated |
| Siemens | Desigo PXC5 | All versions < V02.20.142.10-10884 | Not stated |
| Siemens | Desigo Dxr2 Firmware | before 01.21.142.5-22 | 01.21.142.5-22 |
| Siemens | Desigo Pxc3 Firmware | before 01.21.142.4-18 | 01.21.142.4-18 |
| Siemens | Desigo Pxc4 Firmware | before 02.20.142.10-10884 | 02.20.142.10-10884 |
| Siemens | Desigo Pxc5 Firmware | before 02.20.142.10-10884 | 02.20.142.10-10884 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 5.0 | Medium | NVD |
Official description
A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.142.5-22), Desigo PXC3 (All versions < V01.21.142.4-18), Desigo PXC4 (All versions < V02.20.142.10-10884), Desigo PXC5 (All versions < V02.20.142.10-10884). The login functionality of the application does not employ any countermeasures against Password Spraying attacks or Credential Stuffing attacks. An attacker could obtain a list of valid usernames on the device by exploiting the issue and then perform a precise Password Spraying or Credential Stuffing attack in order to obtain access to at least one account.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Restriction of Excessive Authentication Attempts
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
How developers prevent this class of flaw
- Common protection mechanisms include: Disconnecting the user after a small number of failed attempts Implementing a timeout Locking out a targeted account Requiring a computational task on the user's part.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
More Improper Restriction of Excessive Authentication Attempts vulnerabilities (CWE-307)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Desigo DXR2
- 8.1 High severity
PHP Stale Internal Request-State Exploited
- 9.8 Critical severity
PHP Memory Corruption Exploited
- 9.1 Critical severity
Recent Improper Restriction of Excessive Authentication Attempts vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Spotted an error? Tell us.