A vulnerability, which was classified as critical, has been found in LibreHealthIO lh-ehr REL-2.0.0. This issue affects an unknown part of the file letter.php. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

LibreHealthIO lh-ehr version REL-2.0.0 contains a Authenticated Unrestricted File Write in letter.php (2) vulnerability in Patient file letter functions that can result in Write files with malicious content and may lead to remote code execution. This attack appear to be exploitable via User controlled input.

The bug was discovered 08/07/2018. The weakness was disclosed 08/20/2018 (Website). The advisory is shared at 0dd.zone. The identification of this vulnerability is CVE-2018-1000649 since 08/20/2018. The attack may be initiated remotely. A simple authentication is necessary for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 13 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:letter.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.

The entries VDB-123078, VDB-123076, VDB-123075 and VDB-123074 are pretty similar.

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• LibreHealthIO

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• lh-ehr

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• REL-2.0.0

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CPE 2.2info

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