xml2rfc has file inclusion irregularities
Version 3.12.0 changed xml2rfc so that it would not access local files without the presence of its new --allow-local-file-access flag.
This prevented XML External Entity (XXE) injection attacks with xinclude and XML entity references.
It was discovered that xml2rfc does not respect --allow-local-file-access when a local file is specified as src in artwork or sourcecode elements. Furthermore, XML entity references can include any file inside the source dir and below without using the --allow-local-file-access flag.
The xml2rfc <= 3.26.0 behaviour:
xinclude |
XML entity reference | artwork src= |
sourcecode src= |
|
|---|---|---|---|---|
without --allow-local-file-access flag |
No filesystem access | Any file in xml2rfc templates dir and below, any file in source directory and below | Access source directory and below | Access source directory and below |
with --allow-local-file-access flag |
Access any file on filesystem[^1] | Access any file on filesystem[^1] | Access source directory and below | Access source directory and below |
[^1]: Access any file of the filesystem with the permissions of the user running xml2rfc can access.
Impact
Anyone running xml2rfc as a service that accepts input from external users is impacted by this issue.
Specifying a file in src attribute in artwork or sourcecode elements will cause the contents of that file to appear in xml2rfc’s output results.
But that file has to be inside the same directory as the XML input source file.
For artwork and sourcecode, xml2rfc will not look above the source file directory.
The proposed new behaviour
- Generalize file access checks.
- Only allow access to files within src dir and below. (xml entity include can access templates dir).
- Always allow access to
templates_dirfor XML entity includes.
New behaviour:
xinclude |
XML entity reference | artwork src= |
sourcecode src= |
|
|---|---|---|---|---|
without --allow-local-file-access flag |
No filesystem access | No filesystem access (except for templates_dir) |
No filesystem access | No filesystem access |
with --allow-local-file-access flag |
Access source directory and below | Access source directory and below (Can accesstemplates_dir). |
Access source directory and below | Access source directory and below |
Workarounds
Use a secure temporary directory to process un-trusted XML files, and do not reuse it for processing other XML documents.
Betroffene Software
Klicken Sie auf eine Technologie, um alle zugehörigen Schwachstellen anzuzeigen.
| Plattform | Paket | Anfällige Versionen | Behoben in |
|---|---|---|---|
| Python (PyPI) | xml2rfc | >= 3.12.0, < 3.27.0 | 3.27.0 |
Verweise
- CVSS-Vektor
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N- Schwäche (CWE)
CWE-22- Plattform
- Python (PyPI)
- Paket
xml2rfc- Veröffentlicht
- 07.02.2025
- Aktualisiert
- 11.10.2026 12:19
Quellen und Lizenzen
OSV / GitHub Advisory Database - GHSA-432c-wxpg-m4q3 - CC BY 4.0
Schwachstellenhistorie: xml2rfc
Alle veröffentlichten Schwachstellen dieses Pakets (Python (PyPI)), neueste zuerst. Zeigt, ob es ein einmaliger Ausrutscher ist oder ein Paket, das man im Auge behalten muss.
- Einträge insgesamt
- 4
- Erste → letzte
- 04.2022 09.2025
- Ohne Fix
- 0
- In Angriffen ausgenutzt
- 0
Verteilung nach Schweregrad
- Hoch 2
- Mittel 2
Veröffentlichungen pro Jahr
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 3
- 2026: 0
-
xml2rfc has file inclusion irregularities dieser Eintrag
Erkennen Sie Schwachstellen in Ihrer Anwendung
Mit der DockRay-Integration und aktivierter Softwareinventarisierung prüft DockRay gemeldete Komponentenversionen auf bekannte Schwachstellen und benachrichtigt Sie über bestätigte Treffer. Die Abdeckung hängt von der unterstützten Technologie und den verfügbaren Meldungen ab.