LibreNMS 1.50.1 Graphing Option common.inc.php code injection

Summaryinfo

A vulnerability, which was classified as critical, was found in LibreNMS 1.50.1. Affected by this vulnerability is an unknown functionality of the file includes/html/graphs/common.inc.php of the component Graphing Option Handler. Such manipulation leads to code injection. This vulnerability is documented as CVE-2019-12463. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in LibreNMS 1.50.1. It has been rated as critical. Affected by this issue is some unknown functionality of the file includes/html/graphs/common.inc.php of the component Graphing Option Handler. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released 09/09/2019. This vulnerability is handled as CVE-2019-12463 since 05/30/2019. The attack may be launched remotely. A simple authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

By approaching the search of inurl:includes/html/graphs/common.inc.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entries connected to this vulnerability are available at VDB-141418, VDB-141417, VDB-141415 and VDB-141414. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• LibreNMS

Version

• 1.50.1

License

• open-source

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• 🔍

CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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