CVE-2020-29379

MEDIUM

V-SOL OLT Firmware - Unauthenticated Telnet Shell During Firmware Update

Title source: manual
STIX 2.1

Description

An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During the process of updating the firmware, the update script starts a telnetd -l /bin/sh process that does not require authentication for TELNET access.

References (1)

Core 1
Core References
Exploit, Mailing List, Third Party Advisory x_refsource_misc
https://seclists.org/fulldisclosure/2020/Jul/14

Scores

CVSS v3 5.5
EPSS 0.0032
EPSS Percentile 23.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Details

CWE
CWE-306
Status published
Products (2)
vsolcn/v1600d-mini_firmware 1.01.48
vsolcn/v1600d4l_firmware 1.01.49
Published Nov 29, 2020
Tracked Since Feb 18, 2026