PT-2021-14821 · Lantronix · Lantronix Premierwave 2050

Matt Wiseman · Published 2021-12-22 · Updated 2022-04-28 · CVE-2021-21891

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Lantronix PremierWave 2050 version 8.9.0.0R4

Description A stack-based buffer overflow issue exists in the Web Manager FsBrowseClean functionality. This can be triggered by a specially crafted HTTP request, potentially leading to remote code execution in the vulnerable portion of the branch, specifically the deletefile section. An attacker must make an authenticated HTTP request to exploit this issue.

Recommendations For Lantronix PremierWave 2050 version 8.9.0.0R4, consider restricting access to the FsBrowseClean functionality until a patch is available. As a temporary workaround, limit the ability to make authenticated HTTP requests to the deletefile section to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Corruption

Stack Overflow

Weakness Enumeration

CWE-787

CWE-121

Related Identifiers

CVE-2021-21891

Affected Products

Lantronix Premierwave 2050

References · 3

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2021-1334 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-21891 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21891 · Vendor Advisory