CVE-2021-39173

Forced reinstall

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.

Affected

fiveai · Cachet

CVSS v3.1 NVD

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

CVSS v2.0 NVD

6.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P

EPSS

2.36% chance of exploitation in the next 30 days, 84th percentile

Published

2021-08-27

Updated

2024-08-04

Proof-of-concept exploits (1)

• https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection/

Security advisories

• https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection
• fiveai/Cachet/releases/tag/v2.5.1
• fiveai/Cachet/security/advisories/GHSA-r67m-m8c7-jp83
• advisories/GHSA-r67m-m8c7-jp83

References

• CVE Record
• NVD entry