CVE-2017-6900

An issue was discovered in Riello NetMan 204 14-2 and 15-2. The issue is with the login script and wrongpass Python script used for authentication. When calling wrongpass, the variables $VAL0 and $VAL1 should be enclosed in quotes to prevent the potential for Bash command injection. Further to this, VAL0 and VAL1 should be sanitised to ensure they do not contain malicious characters. Passing it the username of '-' will cause it to time out and log the user in because of poor error handling. This will log the attacker in as an administrator where the telnet / ssh services can be enabled, and the credentials for local users can be reset. Also, login.cgi accepts the username as a GET parameter, so login can be achieved by browsing to the /cgi-bin/login.cgi?username=-%20a URI.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://web.archive.org/web/20170205100702/https://blog.synack.co.uk/2017/01/31/my-first-exploit-db-post/	Third Party Advisory
https://blog.synack.co.uk/2017/01/31/my-first-exploit-db-post/	Broken Link

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Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:riello-ups:netman_204_firmware:15-2:::::::*
	cpe:2.3:o:riello-ups:netman_204_firmware:14-2:::::::*

cpe:2.3:h:riello-ups:netman_204:-:*:*:*:*:*:*:*

Information

Published : 2019-07-03 10:15

Updated : 2019-07-15 11:25

NVD link : CVE-2017-6900

Mitre link : CVE-2017-6900

JSON object : View

CWE

CWE-255

Credentials Management Errors

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Products Affected

riello-ups

netman_204_firmware
netman_204

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