CVE-2017-6900

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Summary

CVECVE-2017-6900
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-07-03 17:15:00 UTC
Updated2019-07-15 18:25:00 UTC
DescriptionAn 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.

Risk And Classification

Problem Types: CWE-255

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Riello-ups Netman 204 - All All All
Hardware Riello-ups Netman 204 - All All All
Operating System Riello-ups Netman 204 Firmware 14-2 All All All
Operating System Riello-ups Netman 204 Firmware 15-2 All All All
Operating System Riello-ups Netman 204 Firmware 14-2 All All All
Operating System Riello-ups Netman 204 Firmware 15-2 All All All

References

ReferenceSourceLinkTags
My first Exploit-DB Post!! – Synack MISC web.archive.org Third Party Advisory
My first Exploit-DB Post!! – Synack MISC blog.synack.co.uk Broken Link
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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