CVE-2021-32824

Apache Dubbo is a java based, open source RPC framework. Versions prior to 2.6.10 and 2.7.10 are vulnerable to pre-auth remote code execution via arbitrary bean manipulation in the Telnet handler. The Dubbo main service port can be used to access a Telnet Handler which offers some basic methods to collect information about the providers and methods exposed by the service and it can even allow to shutdown the service. This endpoint is unprotected. Additionally, a provider method can be invoked using the `invoke` handler. This handler uses a safe version of FastJson to process the call arguments. However, the resulting list is later processed with `PojoUtils.realize` which can be used to instantiate arbitrary classes and invoke its setters. Even though FastJson is properly protected with a default blocklist, `PojoUtils.realize` is not, and an attacker can leverage that to achieve remote code execution. Versions 2.6.10 and 2.7.10 contain fixes for this issue.

CVSS v3.0 9.8 CRITICAL

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://securitylab.github.com/advisories/GHSL-2021-034_043-apache-dubbo/	Exploit Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:dubbo::::::::
	cpe:2.3:a:apache:dubbo::::::::

Information

Published : 2023-01-03 10:15

Updated : 2023-01-10 05:57

NVD link : CVE-2021-32824

Mitre link : CVE-2021-32824

JSON object : View

CWE

CWE-502

Deserialization of Untrusted Data

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Products Affected

apache

dubbo

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