JVN#44726469
Improper restriction of XML external entity references (XXE) in XBRL data create application
Overview
XBRL data create application provided by Financial Services Agency improperly restricts XML external entity references (XXE).
Products Affected
- XBRL data create application version 7.0 and earlier
Description
XBRL data create application provided by Financial Services Agency improperly restricts XML external entity references (XXE) (CWE-611).
Impact
By processing a specially crafted XBRL file, arbitrary files on the system may be read by an attacker.
Solution
Update the Software
Update the software to the latest version according to the information provided by the developer.
Vendor Status
| Vendor | Link |
| Financial Services Agency | EDINET Submit Site (Text in Japanese) |
References
JPCERT/CC Addendum
Vulnerability Analysis by JPCERT/CC
| Attack Vector(AV) | Physical (P) | Local (L) | Adjacent (A) | Network (N) |
|---|---|---|---|---|
| Attack Complexity(AC) | High (H) | Low (L) | ||
| Privileges Required(PR) | High (H) | Low (L) | None (N) | |
| User Interaction(UI) | Required (R) | None (N) | ||
| Scope(S) | Unchanged (U) | Changed (C) | ||
| Confidentiality Impact(C) | None (N) | Low (L) | High (H) | |
| Integrity Impact(I) | None (N) | Low (L) | High (H) | |
| Availability Impact(A) | None (N) | Low (L) | High (H) |
| Access Vector(AV) | Local (L) | Adjacent Network (A) | Network (N) |
|---|---|---|---|
| Access Complexity(AC) | High (H) | Medium (M) | Low (L) |
| Authentication(Au) | Multiple (M) | Single (S) | None (N) |
| Confidentiality Impact(C) | None (N) | Partial (P) | Complete (C) |
| Integrity Impact(I) | None (N) | Partial (P) | Complete (C) |
| Availability Impact(A) | None (N) | Partial (P) | Complete (C) |
Comment
The analysis treats "Confidentiality(C)" as the primary impact where the internal files are accessible, whereas "Integrity(I)" and "Availability(A)" as the secondary impacts.
Credit
Taku Toyama of NEC Corporation reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
Other Information
| JPCERT Alert |
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| JPCERT Reports |
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| CERT Advisory |
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| CPNI Advisory |
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| TRnotes |
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| CVE |
CVE-2023-32635 |
| JVN iPedia |
JVNDB-2023-000072 |