CVE-2021-25641

描述

Each Apache Dubbo server will set a serialization id to tell the clients which serialization protocol it is working on. But for Dubbo versions before 2.7.8 or 2.6.9, an attacker can choose which serialization id the Provider will use by tampering with the byte preamble flags, aka, not following the server's instruction. This means that if a weak deserializer such as the Kryo and FST are somehow in code scope (e.g. if Kryo is somehow a part of a dependency), a remote unauthenticated attacker can tell the Provider to use the weak deserializer, and then proceed to exploit it.

如何修補 CVE-2021-25641

要修補 CVE-2021-25641,請將受影響套件升級到下列已修補版本。

• —升級至 2.6.9 或更新版本
• —升級至 2.7.8 或更新版本

CVE-2021-25641 正在被利用嗎?

中等 — EPSS 為 17.7%,可持續追蹤但非最高優先。

受影響套件(2)

• >= 2.5.0, < 2.6.9
• >= 2.5.0, < 2.7.8

CVSS 分數

參考連結(2)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-25641
• WEBlists.apache.org/thread.html/r99ef7fa35585d3a68762de07e8d2b2bc48b8fa669a03e8d84b9673f3%40%3Cdev.dubbo.apache.org%3E