Strix
26.1K

CVE-2021-27342

MEDIUMCVSS 5.9/10EPSS 4.56%

Last modified

CVE-2021-27342 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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. EPSS estimates a 4.56% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1
5.9/10

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

EPSS Probability
4.56%

90.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DlinkDir-842e Firmware<= 3.0.2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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
How severe is CVE-2021-27342?
CVE-2021-27342 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 4.56% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27342?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27342?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST