CVE-2021-20153

Trendnet AC2600 TEW-827DRU version 2.08B01 contains a symlink vulnerability in the bittorrent functionality. If enabled, the bittorrent functionality is vulnerable to a symlink attack that could lead to remote code execution on the device. If an end user inserts a flash drive with a malicious symlink on it that the bittorrent client can write downloads to, then a user is able to download arbitrary files to any desired location on the devices filesystem, which could lead to remote code execution. Example directories vulnerable to this include "config", "downloads", and "torrents", though it should be noted that "downloads" is the only vector that allows for arbitrary files to be downloaded to arbitrary locations.

CVSS v3 6.8 MEDIUM
CVSS v2.0 6.9 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.9 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.9^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://www.tenable.com/security/research/tra-2021-54	Third Party Advisory
https://www.tenable.com/security/research/tra-2021-54	Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:trendnet:tew-827dru_firmware:2.08b01:*:*:*:*:*:*:*

cpe:2.3:h:trendnet:tew-827dru:2.0:*:*:*:*:*:*:*

History

21 Nov 2024, 05:46

Type	Values Removed	Values Added
References	~~() https://www.tenable.com/security/research/tra-2021-54 - Third Party Advisory~~	() https://www.tenable.com/security/research/tra-2021-54 - Third Party Advisory

Information

Published : 2021-12-30 22:15

Updated : 2024-11-21 05:46

NVD link : CVE-2021-20153

Mitre link : CVE-2021-20153

CVE.ORG link : CVE-2021-20153

JSON object : View

Products Affected

trendnet

tew-827dru
tew-827dru_firmware

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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