tsClinical Define.xml Generator and tsClinical…: Improper Restriction of XML External Entity Reference
CVE-2023-22377 is a high-severity improper restriction of XML external entity reference vulnerability in tsClinical Define.xml Generator and tsClinical Metadata Desktop Tools from Fujitsu, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.68% chance of exploitation within 30 days, higher than 53% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Tsclinical Metadata Desktop Tools to 1.1.1 or a later version.
- 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 |
|---|---|---|---|
| FUJITSU | tsClinical Define.xml Generator and tsClinical Metadata Desktop Tools | Not specified in the record | Not stated |
| Fujitsu | Tsclinical Define.xml Generator | 1.0.0 through 1.4.0 | Not stated |
| Fujitsu | Tsclinical Metadata Desktop Tools | 1.0.3 up to, but not including, 1.1.1 | 1.1.1 |
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
- HighSuccess depends on conditions outside the attacker's control.
- 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
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.4 | High | NVD |
| CVSS 3.1 | 7.4 | High | CISA (ADP) |
Official description
Improper restriction of XML external entity reference (XXE) vulnerability exists in tsClinical Define.xml Generator all versions (v1.0.0 to v1.4.0) and tsClinical Metadata Desktop Tools Version 1.0.3 to Version 1.1.0. If this vulnerability is exploited, an attacker may obtain an arbitrary file which meets a certain condition by reading a specially crafted XML file.
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.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- github.com/tsClinical/tsc-desktop/security/advisoriesThird Party Advisory
- jvn.jp/en/jp/JVN00712821/Third Party Advisory
Recent Improper Restriction of XML External Entity Reference vulnerabilities
- 7.8 High severity
- 7.5 High severity
- 7.8 High severity
- 9.1 Critical severity
- 9.1 Critical severity
- 9.8 Critical severity
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