CVE-2021-25641 – com.alibaba:dubbo

Package

Manager: maven
Name: com.alibaba:dubbo
Vulnerable Version: >=2.5.0 <2.6.9

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS: 0.74804 pctl0.98822

Details

Deserializer tampering in Apache Dubbo 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.

Metadata

Created: 2022-03-18T17:56:08Z
Modified: 2022-03-18T17:56:08Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/03/GHSA-v2rg-8cwr-75g8/GHSA-v2rg-8cwr-75g8.json
CWE IDs: ["CWE-502"]
Alternative ID: GHSA-v2rg-8cwr-75g8
Finding: F096
Auto approve: 1