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.
Czego dotyczy
Kliknij technologię, aby zobaczyć wszystkie dotyczące jej podatności.
| Platforma | Paczka | Podatne wersje | Poprawka w wersji |
|---|---|---|---|
| Python (PyPI) | xml2rfc | >= 3.12.0, < 3.27.0 | 3.27.0 |
Odnośniki
- Wektor CVSS
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- Słabość (CWE)
CWE-22- Platforma
- Python (PyPI)
- Paczka
xml2rfc- Ujawniono
- 07.02.2025
- Aktualizacja
- 11.10.2026 12:19
Źródła i licencje
OSV / GitHub Advisory Database - GHSA-432c-wxpg-m4q3 - CC BY 4.0
Historia podatności: xml2rfc
Wszystkie opisane podatności tej paczki (Python (PyPI)), od najnowszej. Widać, czy to jednorazowa wpadka, czy paczka, której trzeba pilnować.
- Wszystkich wpisów
- 4
- Pierwsza → ostatnia
- 04.2022 09.2025
- Bez poprawki
- 0
- Wykorzystywana w atakach
- 0
Rozkład istotności
- Wysoka 2
- Średnia 2
Ujawnienia w latach
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 3
- 2026: 0
-
xml2rfc has file inclusion irregularities ten wpis
Dowiedz się, które podatności dotyczą Twojej aplikacji
Po podłączeniu integracji DockRay i włączeniu raportowania oprogramowania DockRay porównuje zgłoszone wersje komponentów ze znanymi podatnościami i powiadamia o potwierdzonych dopasowaniach. Zakres zależy od obsługiwanej technologii i dostępnych biuletynów.