CVE-2019-12331
XXE in PHPSpreadsheet due to incomplete fix for previous encoding issue
8.8
HIGH
CVSS 3.1
EPSS 1.4%
描述
PHPOffice PhpSpreadsheet before 1.8.0 has an XXE issue. The XmlScanner decodes the sheet1.xml from an .xlsx to utf-8 if something else than UTF-8 is declared in the header. This was a security measurement to prevent CVE-2018-19277 but the fix is not sufficient. By double-encoding the the xml payload to utf-7 it is possible to bypass the check for the string ?<!ENTITY? and thus allowing for an xml external entity processing (XXE) attack.
如何修補 CVE-2019-12331
要修補 CVE-2019-12331,請將受影響套件升級到下列已修補版本。
- —未列出修補版本
- —升級至 1.8.0 或更新版本
CVE-2019-12331 正在被利用嗎?
低 — EPSS 為 1.4%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, <= 1.8.2
- from 0, < 1.8.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |