BPM: Improper Restriction of XML External Entity Reference
CVE-2022-32458 is a high-severity improper restriction of XML external entity reference vulnerability in BPM from Data Systems Consulting, 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 BPM versions: 5.8.6.1 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.13% chance of exploitation within 30 days, higher than 67% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Business Process Management to 5.8.8.1 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 |
|---|---|---|---|
| Data Systems Consulting | BPM | 5.8.6.1 and earlier | Not stated |
| Digiwin | Business Process Management | before 5.8.8.1 | 5.8.8.1 |
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
- 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by CNA (cert.org.tw).
Official description
Digiwin BPM has a XML External Entity Injection (XXE) vulnerability due to insufficient validation for user input. An unauthenticated remote attacker can perform XML injection attack to access arbitrary system files.
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
Third-party and government advisories
- chtsecurity.com/news/09757883-fea6-4aff-9e22-8ae8c4f8f7bbThird Party Advisory
- twcert.org.tw/tw/cp-132-6288-49e01-1.htmlThird Party Advisory
Other vulnerabilities in BPM
- 9.8 Critical severity
Recent Improper Restriction of XML External Entity Reference vulnerabilities
- 7.1 High severity
- 9.8 Critical severity
- 7.5 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
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