CVE-2021-27173

high · 7.5

An issue was discovered on FiberHome HG6245D devices through RP2613. There is a telnet?enable=0&key=calculated(BR0_MAC) backdoor API, without authentication, provided by the HTTP server. This will remove firewall rules and allow an attacker to reach the telnet server (used for the CLI).

7.5

CVSS

12.7%

EPSS (exploit prob.)

96th

EPSS percentile

2021-02-10

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Vendor	Product	Affected versions
fiberhome	hg6245d_firmware	<= rp2613
fiberhome	hg6245d	all versions

Check a specific version with /api/v1/cve/match.

References

https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#httpd-infoleak
https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#httpd-infoleak

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2021-27173