Vulnerability Monitor

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CVE-2021-27342

An authentication brute-force protection mechanism bypass in telnetd in D-Link Router model DIR-842 firmware version 3.0.2 allows a remote attacker to circumvent the anti-brute-force cool-down delay period via a timing-based side-channel attack

Published

2021-05-17T13:15:07.733

Last Modified

2024-11-21T05:57:49.043

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-203

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	dlink	dir-842e_firmware	≤ 3.0.2	Yes
Hardware	dlink	dir-842e	r1	No

References

https://blog.whtaguy.com/2021/05/d-link-router-cve-2021-27342.html Exploit, Third Party Advisory ([email protected])
https://github.com/guywhataguy/D-Link-CVE-2021-27342-exploit/blob/main/dlink-telnet-exploit-CVE-2021-27342.py Exploit, Third Party Advisory ([email protected])
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10225 Vendor Advisory ([email protected])
https://blog.whtaguy.com/2021/05/d-link-router-cve-2021-27342.html Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/guywhataguy/D-Link-CVE-2021-27342-exploit/blob/main/dlink-telnet-exploit-CVE-2021-27342.py Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10225 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)