| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|---|---|
| ca.uhn.hapi.fhir:org.hl7.fhir.convertors | < 5.6.92 | 5.6.92 |
| ca.uhn.hapi.fhir:org.hl7.fhir.core | < 5.6.92 | 5.6.92 |
| ca.uhn.hapi.fhir:org.hl7.fhir.r4b | < 5.6.92 | 5.6.92 |
| ca.uhn.hapi.fhir:org.hl7.fhir.r5 | < 5.6.92 | 5.6.92 |
| ca.uhn.hapi.fhir:org.hl7.fhir.utilities | < 5.6.92 | 5.6.92 |
| ca.uhn.hapi.fhir:org.hl7.fhir.validation | < 5.6.92 | 5.6.92 |
| org.hl7.fhir.publisher:org.hl7.fhir.publisher | < 1.2.30 | 1.2.30 |
| hl7 fhir core | < 5.6.92 | 5.6.92 |
| fhir ig publisher | < 1.2.30 | 1.2.30 |
MITM can enable Zip-Slip.
Scanner.javaThere is no validation that the zip file being unpacked has entries that are not maliciously writing outside of the intended destination directory. https://github.com/hapifhir/org.hl7.fhir.core/blob/8c43e21094af971303131efd081503e5a112db4b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/Scanner.java#L335-L357
This zip archive is downloaded over HTTP instead of HTTPS, leaving it vulnerable to compromise in-flight. https://github.com/hapifhir/org.hl7.fhir.core/blob/8c43e21094af971303131efd081503e5a112db4b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/Scanner.java#L136
TerminologyCacheManager.javaNote: While these links point to only one implementation, both implementations of TerminologyCacheManager.java are vulnerable to this as their code seems to be duplicated.
While there is validation in this bit of logic that attempts to validate that the zip file doesn't contain malicious entries that escape the destination directory, the guard is insufficient.
これらの製品をお使いですか？サイトをスキャンして、脆弱なバージョンが公開されていないか確認しましょう。
無料でサイトをスキャンThis is because the Utilities.path(String... path) method does not normalize the path, although it seems to be attempting to do so.
https://github.com/hapifhir/org.hl7.fhir.core/blob/f58b7acfb5e393cac52cc5bbb170bdb669c2880e/org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/Utilities.java#L617-L675
The normalization only occurs if the path element starts with a path traversal payload. As an example, calling Utilities.path("/base", "/child/../test") will return the string "/base/child/../test".
This guard logic can, thus, be easily bypassed: https://github.com/hapifhir/org.hl7.fhir.core/blob/f58b7acfb5e393cac52cc5bbb170bdb669c2880e/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/terminologies/TerminologyCacheManager.java#L100-L104
Assuming an attacker can control the return value of ze.getName(), they can supply a value like /anything/../../../../zipsip-protection-bypass.txt.
Similarly, an attacker can control the contents of the Zip file via a MITM attack as this logic is used with resources not downloaded over HTTPS.
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