Vulnerability in Riello-Ups Netman 204
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Riello-Ups Netman 204
- Riello-Ups Netman 204 Firmware — versions 14-2, 15-2
Weakness classification (CWE)
References
- blog.synack.co.uk/2017/01/31/my-first-exploit-db-post/ (Broken Link)
- web.archive.org/web/20170205100702/https://blog.synack.co.uk/2017/01/31/my-firs… (Third Party Advisory)
Frequently asked questions
- What is CVE-2017-6900?
- CVE-2017-6900 is a critical-severity vulnerability in Riello-Ups Netman 204, classified under CWE-255. CVSS score: 9.8/10. Published 2019-07-03.
- How severe is CVE-2017-6900?
- Critical severity. CVSS v3 base score is 9.8 out of 10.