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CVE-2022-25217

Common vulnerabilities & exposures (CVE)

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Published at: - 10-03-2022 06:47
Last modified: - 17-03-2022 08:21
Total changes: - 2

Description

Use of a hard-coded cryptographic key pair by the telnetd_startup service allows an attacker on the local area network to obtain a root shell on the device over telnet. The builds of telnetd_startup included in the version 22.5.9.163 of the K2 firmware, and version 32.1.15.93 of the K3C firmware (possibly amongst many other releases) included both the private and public RSA keys. The remaining versions cited here redacted the private key, but left the public key unchanged. An attacker in possession of the leaked private key may, through a scripted exchange of UDP packets, instruct telnetd_startup to spawn an unauthenticated telnet shell as root, by means of which they can then obtain complete control of the device. A consequence of the limited availablility of firmware images for testing is that models and versions not listed here may share this vulnerability.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Low
Attack complexity
Local
Attack vector
High
Availability
High
Confidentiality
High
Integrity
Low
Privileges required
Unchanged
Scope
None
User interaction
7.8
Base score
1.8
5.9
Exploitability score
Impact score
 

Verification logic

OR
AND
OR
vendor=phicomm AND product=k2_firmware AND versionEndIncluding=22.5.9.163
OR
vendor=phicomm AND product=k2 AND version=-
AND
OR
vendor=phicomm AND product=k3c_firmware AND versionEndIncluding=32.1.15.93
OR
vendor=phicomm AND product=k3c AND version=-
 

Reference

 


Keywords

NVD

 

CVE-2022-25217

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

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