OGC Web Feature Service: Improper Restriction of XML External Entity Reference
CVE-2022-4607 is a critical-severity improper restriction of XML external entity reference vulnerability in OGC Web Feature Service from 3D City Database, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected OGC Web Feature Service versions: 5.0; 5.1; 5.2. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.8% chance of exploitation within 30 days, higher than 57% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of OGC Web Feature Service you run against the affected versions below, and install the vendor's latest release.
- 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 |
|---|---|---|---|
| 3D City Database | OGC Web Feature Service | 5.0; 5.1; 5.2 | 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
- 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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/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 | 5.5 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
A vulnerability was found in 3D City Database OGC Web Feature Service up to 5.2.0. It has been rated as problematic. This issue affects some unknown processing. The manipulation leads to xml external entity reference. Upgrading to version 5.2.1 is able to address this issue. The name of the patch is 246f4e2a97ad81491c00a7ed72ce5e7c7f75050a. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-216215.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Restriction of XML External Entity Reference
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
How developers prevent this class of flaw
- Many XML parsers and validators can be configured to disable external entity expansion.
More Improper Restriction of XML External Entity Reference vulnerabilities (CWE-611)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- github.com/3dcitydb/web-feature-service/commit/246f4e2a97ad81491c00a7ed72ce5e7c7f75050aThird Party Advisory
- github.com/3dcitydb/web-feature-service/pull/12Third Party Advisory
- github.com/3dcitydb/web-feature-service/releases/tag/v5.2.1Third Party Advisory
Third-party and government advisories
- vuldb.com/?id.216215Third Party Advisory
Recent Improper Restriction of XML External Entity Reference vulnerabilities
- 8.8 High severity
- 9.8 Critical severity
- 7.2 High severity
- 7.5 High severity
- 9.1 Critical severity
- 9.1 Critical severity
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