GHSA-w5r2-gvgf-mpm8
Improper Encoding or Escaping of Output and Injection in LibreNMS
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | librenms/librenms | >= 1.50.1, < 1.53 | 1.53 |
Details
As written in the advisory (Markdown source, shown as plain text).
An issue was discovered in LibreNMS 1.50.1. The scripts that handle graphing options (includes/html/graphs/common.inc.php and includes/html/graphs/graphs.inc.php) do not sufficiently validate or encode several fields of user supplied input. Some parameters are filtered with mysqli_real_escape_string, which is only useful for preventing SQL injection attacks; other parameters are unfiltered. This allows an attacker to inject RRDtool syntax with newline characters via the html/graph.php and html/graph-realtime.php scripts. RRDtool syntax is quite versatile and an attacker could leverage this to perform a number of attacks, including disclosing directory structure and filenames, disclosing file content, denial of service, or writing arbitrary files. NOTE, relative to CVE-2019-10665, this requires authentication and the pathnames differ.
References
External links from the advisory. They lead to third-party sites.