#VU56236 Deserialization of Untrusted Data in Rundeck - CVE-2021-39132

Vulnerability identifier: #VU56236

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-39132

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rundeck
Web applications / Modules and components for CMS

Vendor: Rundeck

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. A remote authenticated 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

Rundeck: 3.3.0 rc1 - 3.3.13, 3.4.0 rc1 - 3.4.2

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External links
https://github.com/rundeck/rundeck/security/advisories/GHSA-q4rf-3fhx-88pf
https://github.com/rundeck/rundeck/commit/850d12e21d22833bc148b7f458d7cb5949f829b6

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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