Dompdf: Files or Directories Accessible to External Parties
CVE-2022-41343 is a high-severity files or directories accessible to external parties vulnerability in Dompdf from Dompdf Project, 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. The record lists version 2.0.1 as the first without the flaw, so updating Dompdf to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 5.98% chance of exploitation within 30 days, which is in the top 6.57% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Dompdf to 2.0.1 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 |
|---|---|---|---|
| Dompdf Project | Dompdf | before 2.0.1 | 2.0.1 |
Version data comes from NVD's product matching. 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 NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.1 | 7.5 | High | CISA (ADP) |
Official description
registerFont in FontMetrics.php in Dompdf before 2.0.1 allows remote file inclusion because a URI validation failure does not halt font registration, as demonstrated by a @font-face rule.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Files or Directories Accessible to External Parties
The product makes files or directories accessible to unauthorized actors, even though they should not be.
How developers prevent this class of flaw
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to disable public access.
More Files or Directories Accessible to External Parties vulnerabilities (CWE-552)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- github.com/dompdf/dompdf/issues/2994Exploit, Issue Tracking, Third Party Advisory
- github.com/dompdf/dompdf/pull/2995Third Party Advisory
- github.com/dompdf/dompdf/releases/tag/v2.0.1Release Notes, Third Party Advisory
Technical write-ups (may include proof of concept)
- tantosec.com/blog/cve-2022-41343/Exploit, Third Party Advisory
Other vulnerabilities in Dompdf
- 9.8 Critical severity
Recent Files or Directories Accessible to External Parties vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 8.4 High severity
- 7.5 High severity
- 7.5 High severity
- 7.8 High severity
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