CVE-2021-32824

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Summary

CVECVE-2021-32824
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-01-03 18:15:00 UTC
Updated2023-01-10 13:57:00 UTC
DescriptionApache 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.

Risk And Classification

Problem Types: CWE-502

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Apache Dubbo All All All All

References

ReferenceSourceLinkTags
GHSL-2021-034_043: Multiple pre-auth RCEs in Apache Dubbo - CVE-2021-25641, CVE-2021-30179, CVE-2021-30180, CVE-2021-30181, CVE-2021-32824 | GitHub Security Lab CONFIRM securitylab.github.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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