CVE-2020-9484
tomcat7 - security update
描述
When using Apache Tomcat versions 9.0.0 through 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that all of conditions a) to d) must be true for the attack to succeed.
如何修補 CVE-2020-9484
要修補 CVE-2020-9484,請將受影響套件升級到下列已修補版本。
- —升級至 7.0.108 或更新版本
- —升級至 7.0.56-3+really7.0.100-1+deb8u1 或更新版本
- —升級至 9.0.35-1 或更新版本
- —升級至 10.0.0-M5 或更新版本
- —升級至 10.0.0-M5 或更新版本
CVE-2020-9484 正在被利用嗎?
可能 — EPSS 為 56.6%,屬於高被利用機率區間,建議優先修補。
受影響套件(5)
- >= 7.0.0, < 7.0.108, >= 8.5.0, < 8.5.63, >= 9.0.1, < 9.0.43
- from 0, < 7.0.56-3+really7.0.100-1+deb8u1
- from 0, < 9.0.35-1
- >= 10.0.0-M1, < 10.0.0-M5
- >= 10.0.0-M1, < 10.0.0-M5
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |