SAP PowerDesigner Client: Missing XML Validation
CVE-2023-40310 is a high-severity missing XML validation vulnerability in SAP PowerDesigner Client from SAP, 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 SAP PowerDesigner Client versions: 16.7. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 3.63% chance of exploitation within 30 days, higher than 90% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of SAP PowerDesigner Client you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on sap.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 |
|---|---|---|---|
| SAP | SAP PowerDesigner Client | 16.7 | Not stated |
| SAP | Powerdesigner | 16.7 | 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
- 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 3.1 | 6.5 | Medium | CNA (sap.com) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
SAP PowerDesigner Client - version 16.7, does not sufficiently validate BPMN2 XML document imported from an untrusted source. As a result, URLs of external entities in BPMN2 file, although not used, would be accessed during import. A successful attack could impact availability of SAP PowerDesigner Client.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing XML Validation
The product accepts XML from an untrusted source but does not validate the XML against the proper schema.
How developers prevent this class of flaw
- Always validate XML input against a known XML Schema or DTD. It is not possible for an XML parser to validate all aspects of a document's content because a parser cannot understand the complete semantics of the data. However, a parser can do a complete and thorough job of checking the document's structure and therefore guarantee to the code that processes the document that the content is well-formed.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other references
- me.sap.com/notes/3357154Permissions Required
Recent Missing XML Validation vulnerabilities
- 8.1 High severity
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