Vulnerability identifier: #VU31185

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-18850

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Octopus Deploy
Server applications / Application servers

Vendor: Octopus Deploy

Description

The vulnerability allows a remote authenticated user to execute arbitrary code.

In Octopus Deploy 2018.8.0 through 2018.9.x before 2018.9.1, an authenticated user with permission to modify deployment processes could upload a maliciously crafted YAML configuration, potentially allowing for remote execution of arbitrary code, running in the same context as the Octopus Server (for self-hosted installations by default, SYSTEM).

Mitigation
Install update from vendor's website.

Vulnerable software versions

Octopus Deploy: 2018.9.0

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External links
http://github.com/OctopusDeploy/Issues/issues/5042

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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.