CVE-2021-39172: Improper Neutralization of CRLF Sequences ('CRLF Injection')

August 30, 2021 (updated September 29, 2021)

Cachet is an open source status page system. Prior to version 2.5.1, 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. This issue was addressed in version 2.5.1 by improving UpdateConfigCommandHandler and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

References

github.com/advisories/GHSA-9jxw-cfrh-jxq6
github.com/fiveai/Cachet/releases/tag/v2.5.1
github.com/fiveai/Cachet/security/advisories/GHSA-9jxw-cfrh-jxq6
nvd.nist.gov/vuln/detail/CVE-2021-39172

Code Behaviors & Features

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