Remote code execution in Apache Dubbo

Published: 2021-01-11 | Updated: 2022-11-13

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-11995 CVE-2021-25641
CWE-ID	CWE-502
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Apache Dubbo Web applications / Other software
Vendor	Apache Foundation

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated: 06.06.2021

Added vulnerability #2.

1) Deserialization of Untrusted Data

EUVDB-ID: #VU50267

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11995

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within the Hessian2 protocol. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Dubbo: 2.0.7 - 2.7.7

External links

http://lists.apache.org/thread.html/r5b2df4ef479209dc4ced457b3d58a887763b60b9354c3dc148b2eb5b%40%3Cdev.dubbo.apache.org%3E
http://www.zerodayinitiative.com/advisories/ZDI-21-127/
http://www.zerodayinitiative.com/advisories/ZDI-21-128/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Deserialization of Untrusted Data

EUVDB-ID: #VU53826

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-25641