JVN#73178249
Improper restriction of XML external entity references (XXE) in Shinseiyo Sogo Soft
Overview
Shinseiyo Sogo Soft provided by The Ministry of Justice improperly restricts XML external entity references (XXE).
Products Affected
- Shinseiyo Sogo Soft (7.9A) and earlier
Description
Shinseiyo Sogo Soft provided by The Ministry of Justice improperly restricts XML external entity references (XXE) (CWE-611).
Impact
By processing a specially crafted XML file, arbitrary files on the PC may be accessed 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 |
| The Ministry of Justice | Registration and deposits online application system (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 evaluates "Confidentiality(C)" as the primary impact where the internal file information is accessible, whereas treating "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-2023-27527 |
| JVN iPedia |
JVNDB-2023-000035 |