CVE-2021-3902
Improper Restriction of XML External Entity Reference in dompdf/dompdf
9.8
CRITICAL
CVSS 3.1
EPSS 0.92%
描述
An improper restriction of external entities (XXE) vulnerability in dompdf/dompdf's SVG parser allows for Server-Side Request Forgery (SSRF) and deserialization attacks. This issue affects all versions prior to 2.0.0. The vulnerability can be exploited even if the isRemoteEnabled option is set to false. It allows attackers to perform SSRF, disclose internal image files, and cause PHAR deserialization attacks.
如何修補 CVE-2021-3902
要修補 CVE-2021-3902,請將受影響套件升級到下列已修補版本。
- —升級至 2.0.2+dfsg-1 或更新版本
- —升級至 2.0.0 或更新版本
CVE-2021-3902 正在被利用嗎?
低 — EPSS 為 0.9%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 2.0.2+dfsg-1
- from 0, < 2.0.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |