CompactLogix 5380 controllers: Missing Release of Memory after Effective Lifetime
CVE-2024-8626 is a high-severity missing release of memory after effective lifetime vulnerability in CompactLogix 5380 controllers from Rockwell Automation, 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 CompactLogix 5380 controllers versions: v33.011 <. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.52% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update compactlogix_5380_firmware to 33.015 or a later version.
- Update compact_guardlogix_5380_firmware to 33.015 or a later version.
- Update compactlogix_5480_firmware to 33.015 or a later version.
- Read the advisory on rockwellautomation.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 |
|---|---|---|---|
| Rockwell Automation | CompactLogix 5380 controllers | v33.011 < | Not stated |
| Rockwell Automation | Compact GuardLogix® 5380 controllers | v33.011< | Not stated |
| Rockwell Automation | CompactLogix 5480 controllers | v33.011< | Not stated |
| Rockwell Automation | GuardLogix 5580 controllers | v33.011< | Not stated |
| Rockwell Automation | 1756-EN4TR | v3.002 | Not stated |
| Rockwell Automation | compactlogix_5380_firmware | 33.011 up to, but not including, 33.015 | 33.015 |
| Rockwell Automation | compact_guardlogix_5380_firmware | 33.011 up to, but not including, 33.015 | 33.015 |
| Rockwell Automation | compactlogix_5480_firmware | 33.011 up to, but not including, 33.015 | 33.015 |
| Rockwell Automation | guardlogix_5580_firmware | 33.001 up to, but not including, 33.015 | 33.015 |
| Rockwell Automation | 1756-en4tr_firmware | 3.002 | Not stated |
| Rockwell Automation | Controllogix 5580 Firmware | 33.011 up to, but not including, 33.015 | 33.015 |
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 4.0 | 8.7 | High | CNA (rockwellautomation.com) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
Due to a memory leak, a denial-of-service vulnerability exists in the Rockwell Automation affected products. A malicious actor could exploit this vulnerability by performing multiple actions on certain web pages of the product causing the affected products to become fully unavailable and require a power cycle to recover.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Release of Memory after Effective Lifetime
The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
How developers prevent this class of flaw
- Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone. For example, glibc in Linux provides protection against free of invalid pointers. When using Xcode to target OS X or iOS, enable automatic reference counting (ARC). To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std
- Use an abstraction library to abstract away risky APIs. Not a complete solution.
- Consider using the Boehm-Demers-Weiser garbage collector (bdwgc), which can help avoid leaks.
More Missing Release of Memory after Effective Lifetime vulnerabilities (CWE-401)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in CompactLogix 5380 controllers
- 8.6 High severity
- 9.8 Critical severity
Recent Missing Release of Memory after Effective Lifetime vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.8 High severity
- 7.5 High severity
- 7.5 High severity
- 7.1 High severity
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