CVE-2021-21891 — CRITICAL (9.1)

Vulnerability Description

A stack-based buffer overflow vulnerability exists in the Web Manager FsBrowseClean functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to remote code execution in the vulnerable portion of the branch (deletefile). An attacker can make an authenticated HTTP request to trigger this vulnerability.

CVSS Score

9.1

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Lantronix	Premierwave 2050 Firmware	8.9.0.0
Lantronix	Premierwave 2050	-

Related Weaknesses (CWE)

CWE-121 CWE-787

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1334ExploitTechnical DescriptionThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1334ExploitTechnical DescriptionThird Party Advisory

FAQ

What is CVE-2021-21891?

CVE-2021-21891 is a vulnerability with a CVSS score of 9.1 (CRITICAL). A stack-based buffer overflow vulnerability exists in the Web Manager FsBrowseClean functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to remote...

How severe is CVE-2021-21891?

CVE-2021-21891 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-21891?

Check the references section above for vendor advisories and patch information. Affected products include: Lantronix Premierwave 2050 Firmware, Lantronix Premierwave 2050.