PT-2021-17260 · Fiberhome · Fiberhome Hg6245D

Pierre Kim · Published 2021-02-10 · Updated 2021-02-12 · CVE-2021-27141

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 devices through RP2613

Description: An issue was discovered where credentials in /fhconf/umconfig.txt are obfuscated via XOR with a hardcoded key. The webs binary contains details on how XOR is used for obfuscation.

Recommendations: For FiberHome HG6245D devices through RP2613, consider restricting access to the /fhconf/umconfig.txt file 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

Using Hardcoded Credentials

Weakness Enumeration

CWE-798

Related Identifiers

CVE-2021-27141

Affected Products

Fiberhome Hg6245D

References · 4

• 🔥 https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#httpd-decryption-algorithm · Exploit
• https://osv.dev/vulnerability/CVE-2021-27141 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27141 · Security Note
• https://t.me/cvenotify/9852 · Telegram Post