| 제목 | https://github.com/liweiyi/ChestnutCMS ChestnutCMS ≤1.5.3 Arbitrary file read vulnerability |
|---|
| 설명 | Chestnutcms has an arbitrary file read vulnerability. The /cms/file/read route can read the filePath path file. There are filtering functions FileExUtils.normalizePath(filePath); and !EDITABLE_FILE_TYPE.contains(FileExUtils.getExtension(path)) to determine whether the directory is traversed and whether the file type suffix is in the whitelist. NormalizePath can be bypassed by...../. !EDITABLE_FILE_TYPE.contains(FileExUtils.getExtension(path)) can use the folder creation function to first create a "1.txt?" directory and then use "1.txt?/...../[file]" to achieve arbitrary file read.
Vulnerability cause analysis
The "`FileExUtils.getExtension`" function used in the "`FileServiceImpl.java#readFile`" function of file reading can be bypassed by using "`1.txt?`”.
At this time, the suffix obtained by "`FileExUtils.getExtension`" is `txt`, which is in the whitelist, but the concatenated path in the following "`new File(root + path)`" is still our malicious path.So you can read any sensitive file on the server. |
|---|
| 원천 | ⚠️ https://r0ot.notion.site/ChestnutCMS-1-5-3-Arbitrary-file-read-vulnerability-1ae27d744f7f8074a169ca849e8a1d31?pvs=4 |
|---|
| 사용자 | sidney (UID 82628) |
|---|
| 제출 | 2025. 03. 15. AM 10:21 (1 년도 ago) |
|---|
| 모더레이션 | 2025. 03. 28. PM 12:35 (13 days later) |
|---|
| 상태 | 수락 |
|---|
| VulDB 항목 | 301890 [ChestnutCMS 까지 1.5.3 /dev-api/cms/file/read readFile filePath 디렉토리 순회] |
|---|
| 포인트들 | 17 |
|---|