center/dataease-dm
center/dataease-dm
13
0
Fork 0
forked from github/dataease
Code Pull Requests Activity

Merge pull request #12244 from dataease/pr@dev-v2@fix_xxe-svg

Browse Source 
fix: 修复svg上传时内容被篡改引起的xxe注入问题
This commit is contained in:
王嘉豪 2024-09-18 10:27:59 +08:00 committed by GitHub
commit 3ced97be57
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
core/core-backend/src/main/java/io/dataease/visualization/server/StaticResourceServer.java
View File

@ -68,8 +68,15 @@ public class StaticResourceServer implements StaticResourceApi {
return false;
}
String mimeType = file.getContentType();
if (StringUtils.isEmpty(mimeType)) {
return false;
}
// 判断是否为图片或SVG
return (mimeType != null && mimeType.startsWith("image/")) || isValidSVG(file);
if (mimeType.toLowerCase().equals("image/svg+xml")) {
return isValidSVG(file);
} else {
return mimeType.startsWith("image/");
}
}
public void saveFilesToServe(String staticResource) {
@ -123,9 +130,14 @@ public class StaticResourceServer implements StaticResourceApi {
}
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
try (InputStream inputStream = file.getInputStream()) {
// 禁用外部实体解析以防止XXE攻击
dbf.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
dbf.setFeature("http://xml.org/sax/features/external-general-entities", false);
dbf.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
dbf.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(inputStream);