| 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 |
|---|---|---|
| libexpat | < 2.4.0 | 2.4.0 |
| python | ≥ 3.6.0, < 3.6.15≥ 3.7.0, < 3.7.12≥ 3.8.0, < 3.8.12≥ 3.9.0, < 3.9.7 | 3.6.153.7.123.8.123.9.7 |
expat before version 2.4.0 does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE.
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