PT-2021-17298 · Fiberhome · Fiberhome Hg6245D

Pierre Kim · Published 2021-02-10 · Updated 2021-02-12 · CVE-2021-27179

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

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

Description: An issue was discovered on FiberHome HG6245D devices, allowing the telnet daemon to be crashed by sending a certain string, specifically 0a 65 6e 61 62 6c 65 0a 02 0a 1a 0a.

Recommendations: As a temporary workaround, consider disabling the telnet daemon until a patch is available. Restrict access to the telnet service to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2021-27179

Affected Products

Fiberhome Hg6245D

References · 5

• 🔥 https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-dos · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-27179 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27179 · Vendor Advisory
• https://t.me/cvenotify/9845 · Telegram Post
• https://t.me/cibsecurity/23404 · Telegram Post