CVE-2021-39173 Information

Description

Cachet is an open source status page system. Prior to version 2.5.1 authenticated users regardless of their privileges (User or Admin) can trick Cachet and install the instance again leading to arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving the middleware ReadyForUse which now performs a stricter validation of the instance name. As a workaround only allow trusted source IP addresses to access to the administration dashboard.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/fiveai/Cachet/releases/tag/v2.5.1 https://github.com/fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8