CVE-2021-27171

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to start a Linux telnetd as root on port 26/tcp by using the CLI interface commands of ddd and shell (or tshell).

CVSS v3 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-privilege-escalation	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:fiberhome:hg6245d_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:fiberhome:hg6245d:-:*:*:*:*:*:*:*

History

12 Feb 2021, 01:00

Type	Values Removed	Values Added
CWE		CWE-787
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 10.0 v3 : 9.8
CPE		cpe:2.3:o:fiberhome:hg6245d_firmware:::::::: cpe:2.3:h:fiberhome:hg6245d:-:::::::*
References	~~(MISC) https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-privilege-escalation -~~	(MISC) https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-privilege-escalation - Exploit, Third Party Advisory

10 Feb 2021, 19:57

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-02-10 19:15

Updated : 2023-12-10 13:41

NVD link : CVE-2021-27171

Mitre link : CVE-2021-27171

CVE.ORG link : CVE-2021-27171

JSON object : View

Products Affected

fiberhome

hg6245d_firmware
hg6245d

CWE

CWE-787

Out-of-bounds Write

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