Meinberg LANTIME Web Configuration Utility 6.16.008 Arbitrary File Read

2017.12.13
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-200


CVSS Base Score: 4/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

Title: Meinberg LANTIME Web Configuration Utility - Arbitrary File Read Author: Jakub Palaczynski CVE: CVE-2017-16787 Exploit tested on: ================== Meinberg LANTIME Web Configuration Utility 6.16.008 Vulnerability affects: ====================== All LTOS6 firmware releases before 6.24.004 Vulnerability: ************** Arbitrary File Read: ==================== It is possible to read arbitrary file on the system with root permissions Proof of Concept: First instance: https://host/cgi-bin/mainv2?value=800&showntpclientipinfo=xxx&ntpclientcounterlogfile=/etc/passwd&lcs=xxx Info-User user is able to read any file on the system with root permissions. Second instance: User with Admin-User access is able to read any file on the system via firmware update functionality. Curl accepts "file" schema which actually downloads file from the filesystem. Then it is possible to download /upload/update file which contains content of requested file. Contact: ======== Jakub[dot]Palaczynski[at]gmail[dot]com


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