My Cloud: Incorrect Comparison
CVE-2022-22990 is a high-severity incorrect comparison vulnerability in My Cloud from Western Digital, 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. The record lists version 5.19.117 as the first without the flaw, so updating My Cloud to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.19% chance of exploitation within 30 days, higher than 83% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update My Cloud to 5.19.117 or a later version.
- Update My Cloud OS to 5.19.117 or a later version.
- Read the advisory on westerndigital.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Western Digital | My Cloud | My Cloud OS 5 up to, but not including, 5.19.117 | 5.19.117 |
| Westerndigital | My Cloud OS | before 5.19.117 | 5.19.117 |
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 | 7.8 | High | CNA (wdc.com) |
| CVSS 3.1 | 8.8 | High | NVD |
| CVSS 2.0 | 8.3 | High | NVD |
Official description
A limited authentication bypass vulnerability was discovered that could allow an attacker to achieve remote code execution and escalate privileges on the My Cloud devices. Addressed this vulnerability by changing access token validation logic and rewriting rule logic on PHP scripts.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incorrect Comparison
The product compares two entities in a security-relevant context, but the comparison is incorrect.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- zerodayinitiative.com/advisories/ZDI-22-076/Third Party Advisory, VDB Entry
- zerodayinitiative.com/advisories/ZDI-22-347/Third Party Advisory, VDB Entry
Other vulnerabilities in My Cloud
- 9.3 Critical severity
- 9.2 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 7.8 High severity
- 9.8 Critical severity
Recent Incorrect Comparison vulnerabilities
- 7.5 High severity
Unraid Authentication Bypass Exploited
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