PT-2021-17296 · Fiberhome · Fiberhome Hg6245D

Pierre Kim · Published 2021-02-10 · Updated 2021-02-12 · CVE-2021-27177

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: FiberHome HG6245D versions through RP2613

Description: An issue was discovered that allows bypassing authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.

Recommendations: For FiberHome HG6245D versions through RP2613, as a temporary workaround, consider restricting access to the telnet server until a patch is available.

Exploit

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2021-27177

Affected Products

Fiberhome Hg6245D

References · 4

• 🔥 https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-auth-bypass · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-27177 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27177 · Vendor Advisory
• https://t.me/cibsecurity/23396 · Telegram Post