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    CVE-2021-27173

    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).

    Published:Feb 10, 2021
    Last Modified:Nov 21, 2024
    EPS:Feb 10, 2021
    EPSS Score:0.00075
    CVSS Score:7.5

    Affected Products

    Vendor
    Fiberhome
    Product
    Hg6245d
    Vendor
    Fiberhome
    Product
    Hg6245d Firmware

    Exploits

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

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2021-4464 (CVSS 9.3) — FiberHome AN5506-04-FA firmware versions up to and including RP2631 and HG6245D prior to RP2602 contain a stac…
    CVE-2021-27139 (CVSS 7.5) — An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to extract information fro…
    CVE-2021-27140 (CVSS 7.5) — An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to find passwords and auth…
    CVE-2021-27141 (CVSS 9.8) — An issue was discovered on FiberHome HG6245D devices through RP2613. Credentials in /fhconf/umconfig.txt are o…
    CVE-2021-27142 (CVSS 7.5) — An issue was discovered on FiberHome HG6245D devices through RP2613. The web management is done over HTTPS, us…
    CVE-2021-27143 (CVSS 9.8) — An issue was discovered on FiberHome HG6245D devices through RP2613. The web daemon contains the hardcoded use…
    CVE-2021-27144 (CVSS 9.8) — An issue was discovered on FiberHome HG6245D devices through RP2613. The web daemon contains the hardcoded f~i…
    CVE-2021-27145 (CVSS 9.8) — An issue was discovered on FiberHome HG6245D devices through RP2613. The web daemon contains the hardcoded adm…
    CVE-2021-27146 (CVSS 9.8) — An issue was discovered on FiberHome HG6245D devices through RP2613. The web daemon contains the hardcoded adm…
    CVE-2021-27147 (CVSS 9.8) — An issue was discovered on FiberHome HG6245D devices through RP2613. The web daemon contains the hardcoded adm…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High