CVE-2021-27171

CVSS V2 High 10 CVSS V3 Critical 9.8

Description

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).

Overview

CVE ID
CVE-2021-27171

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2021-02-10T19:15:15

Last Modified Date
2021-02-12T01:00:50

Weakness Enumerations

CWE	URL
CWE-787	http://cwe.mitre.org/data/definitions/787.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
		AND
cpe:2.3:o:fiberhome:hg6245d_firmware::::::::	1	OR		rp2613
cpe:2.3:h:fiberhome:hg6245d:-:::::::*	0	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
COMPLETE

Integrity Impact
COMPLETE

Availability Impact
COMPLETE

Base Score
10

Severity
HIGH

Exploitability Score
10

Impact Score
10

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
9.8

Base Severity
CRITICAL

Exploitability Score
3.9

Impact Score
5.9

References

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

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-27171
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27171

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:23:32				Added to TrackCVE
2022-12-05 21:53:01	2021-02-10T19:15Z	2021-02-10T19:15:15	CVE Published Date	updated
2022-12-05 21:53:01		2021-02-12T01:00:50	CVE Modified Date	updated
2022-12-05 21:53:01		Analyzed	Vulnerability Status	updated