NetWorker: Improper Authorization
CVE-2023-28055 is a high-severity improper authorization vulnerability in NetWorker from Dell, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected NetWorker versions: Versions 19.9 through 19.9.0.1; Versions 19.8, through 19.8.0.2; Versions 19.7 through 19.7.0.4, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.38% 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
- Check which version of NetWorker you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on dell.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Dell | NetWorker | Versions 19.9 through 19.9.0.1; Versions 19.8, through 19.8.0.2; Versions 19.7 through 19.7.0.4; Version 19.7.1 | Not stated |
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
- AdjacentThe attacker must be on the same local network segment.
- 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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.8 | High | CNA (emc.com) |
| CVSS 3.1 | 8.8 | High | NVD |
Official description
Dell NetWorker, Version 19.7 has an improper authorization vulnerability in the NetWorker client. An unauthenticated attacker within the same network could potentially exploit this by manipulating a command leading to gain of complete access to the server file further resulting in information leaks, denial of service, and arbitrary code execution. Dell recommends customers to upgrade at the earliest opportunity.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authorization
The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
How developers prevent this class of flaw
- Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) to enforce the roles at the appropriate boundaries. Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
- Ensure that you perform access control checks related to your business logic. These checks may be different than the access control checks that you apply to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using authorization frameworks such as the JAAS Authorization Framework and the OWASP ESAPI Access Control feature.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in NetWorker
- 7.5 High severity
- 7.8 High severity
- 7.8 High severity
- 7.5 High severity
- 9.8 Critical severity
Recent Improper Authorization vulnerabilities
- 9.1 Critical severity
- 7.8 High severity
- 7.8 High severity
- 9.8 Critical severity
- 7.1 High severity
- 9.8 Critical severity
Spotted an error? Tell us.