CP-8000 MASTER MODULE WITH I/O -25/+70°C: Missing Release of Resource after Effective Lifetime
CVE-2022-29884 is a high-severity missing release of resource after effective lifetime vulnerability in CP-8000 MASTER MODULE WITH I/O -25/+70°C 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 CP-8000 MASTER MODULE WITH I/O -25/+70°C versions: All versions < CPC80 V16.30. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.32% chance of exploitation within 30 days, higher than 71% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Sicam A8000 Cp-8000 Firmware to 16.30 or a later version.
- Update Sicam A8000 Cp-8021 Firmware to 16.30 or a later version.
- Update Sicam A8000 Cp-8022 Firmware to 16.30 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 | CP-8000 MASTER MODULE WITH I/O -25/+70°C | All versions < CPC80 V16.30 | Not stated |
| Siemens | CP-8000 MASTER MODULE WITH I/O -40/+70°C | All versions < CPC80 V16.30 | Not stated |
| Siemens | CP-8021 MASTER MODULE | All versions < CPC80 V16.30 | Not stated |
| Siemens | CP-8022 MASTER MODULE WITH GPRS | All versions < CPC80 V16.30 | Not stated |
| Siemens | Sicam A8000 Cp-8000 Firmware | before 16.30 | 16.30 |
| Siemens | Sicam A8000 Cp-8021 Firmware | before 16.30 | 16.30 |
| Siemens | Sicam A8000 Cp-8022 Firmware | before 16.30 | 16.30 |
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
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 7.1 | High | NVD |
Official description
A vulnerability has been identified in CP-8000 MASTER MODULE WITH I/O -25/+70°C (All versions < CPC80 V16.30), CP-8000 MASTER MODULE WITH I/O -40/+70°C (All versions < CPC80 V16.30), CP-8021 MASTER MODULE (All versions < CPC80 V16.30), CP-8022 MASTER MODULE WITH GPRS (All versions < CPC80 V16.30). When using the HTTPS server under specific conditions, affected devices do not properly free resources. This could allow an unauthenticated remote attacker to put the device into a denial of service condition.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Release of Resource after Effective Lifetime
The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
How developers prevent this class of flaw
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
- It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free resources in a function. If you allocate resources that you intend to free upon completion of the function, you must be sure to free the resources at all exit points for that function including error conditions.
More Missing Release of Resource after Effective Lifetime vulnerabilities (CWE-772)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Recent Missing Release of Resource after Effective Lifetime vulnerabilities
- 8.6 High severity
- 7.5 High severity
- 7.5 High severity
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