XOR Obfuscation Issue in FiberHome HG6245D Devices
CVE-2021-27141

9.8CRITICAL

Key Information:

Vendor

Fiberhome

Status
Hg6245d Firmware
Vendor
CVE Published:
10 February 2021

What is CVE-2021-27141?

An obfuscation issue has been identified within FiberHome HG6245D devices. The credentials stored in the configuration file /fhconf/umconfig.txt are obfuscated using a simplistic XOR technique with a hardcoded key. This security flaw allows malicious actors to potentially decrypt sensitive information, posing a significant risk to user security and data integrity. The method of obfuscation employed lacks adequate complexity, making it vulnerable to reverse engineering, allowing unauthorized access to device configurations.

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References

https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont...
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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