Data Loss Prevention (DLP): Improper Restriction of XML External Entity Reference
CVE-2022-1700 is a critical-severity improper restriction of XML external entity reference vulnerability in Data Loss Prevention (DLP) from Forcepoint, 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. The record lists version 8.8.2 as the first without the flaw, so updating Data Loss Prevention (DLP) to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.83% chance of exploitation within 30 days, higher than 58% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Data Loss Prevention (DLP) to 8.8.2 or a later version.
- Update One Endpoint (F1E) with Policy Engine to 8.8.2 or a later version.
- Update Web Security Content Gateway to 8.5.5 or a later version.
- Read the advisory on help.forcepoint.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 |
|---|---|---|---|
| Forcepoint | Data Loss Prevention (DLP) | before 8.8.2 | 8.8.2 |
| Forcepoint | One Endpoint (F1E) with Policy Engine | before 8.8.2 | 8.8.2 |
| Forcepoint | Web Security Content Gateway | before 8.5.5 | 8.5.5 |
| Forcepoint | Email Security with DLP enabled | before 8.5.5 | 8.5.5 |
| Forcepoint | Cloud Security Gateway | prior to June 20, 2022 | Not stated |
| Forcepoint | Data Loss Prevention | before 8.8.2 | 8.8.2 |
| Forcepoint | Email Security | before 8.5.5 | 8.5.5 |
| Forcepoint | One Endpoint With Policy Engine | before 8.8.2 | 8.8.2 |
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 | 7.5 | High | CNA (forcepoint.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
Improper Restriction of XML External Entity Reference ('XXE') vulnerability in the Policy Engine of Forcepoint Data Loss Prevention (DLP), which is also leveraged by Forcepoint One Endpoint (F1E), Web Security Content Gateway, Email Security with DLP enabled, and Cloud Security Gateway prior to June 20, 2022. The XML parser in the Policy Engine was found to be improperly configured to support external entities and external DTD (Document Type Definitions), which can lead to an XXE attack. This issue affects: Forcepoint Data Loss Prevention (DLP) versions prior to 8.8.2. Forcepoint One Endpoint (F1E) with Policy Engine versions prior to 8.8.2. Forcepoint Web Security Content Gateway versions prior to 8.5.5. Forcepoint Email Security with DLP enabled versions prior to 8.5.5. Forcepoint Cloud Security Gateway prior to June 20, 2022.
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
Advisories
Recent Improper Restriction of XML External Entity Reference vulnerabilities
- 9.8 Critical severity
- 7.5 High severity
- 8.1 High severity
- 8.6 High severity
- 7.5 High severity
- 9.1 Critical severity
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