CVE-2021-39172
Cachet vulnerable to new line injection during configuration edition
Description
### Impact Authenticated users, regardless of their privileges (_User_ or _Admin_), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. ### Patches This issue was addressed by improving `UpdateConfigCommandHandler` and preventing the use of new lines characters in new configuration values. ### Workarounds Only allow trusted source IP addresses to access to the administration dashboard. ### References - https://blog.sonarsource.com/cachet-code-execution-via-laravel-configuration-injection ### For more information If you have any questions or comments about this advisory, you can contact: - The original reporters, by sending an email to vulnerability.research [at] sonarsource.com; - The maintainers, by opening an issue on this repository.
How to fix CVE-2021-39172
To remediate CVE-2021-39172, upgrade the affected package to a fixed version below.
- —upgrade to 2.5.1 or later
Is CVE-2021-39172 being exploited?
Moderate — EPSS is 29.2%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- from 0, < 2.5.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |