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Vulnerability DatabaseCVE-2021-43082

CVE-2021-43082: 
Apache Traffic Server vulnerability analysis and mitigation

Overview

A Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability was identified in the stats-over-http plugin of Apache Traffic Server, tracked as CVE-2021-43082. The vulnerability affects Apache Traffic Server version 9.1.0 and allows attackers to overwrite memory (NVD, CVE).

Technical details

The vulnerability has been assigned a CVSS v3.1 base score of 9.8 (CRITICAL) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The vulnerability is classified under CWE-120 (Buffer Copy without Checking Size of Input). The issue was introduced in version 9.1.0-rc0 through a specific commit (Debian Tracker).

Impact

Given the CVSS score of 9.8 (CRITICAL), this vulnerability presents a severe risk as it allows attackers to overwrite memory through the stats-over-http plugin. The vulnerability affects confidentiality, integrity, and availability of the system, all rated as high impact according to the CVSS metrics (NVD).

Mitigation and workarounds

The vulnerability has been fixed in subsequent releases. Debian has addressed this in various distributions: bullseye (8.1.11+ds-0+deb11u2), bookworm (9.2.5+ds-0+deb12u1), and sid (9.2.5+ds-1) (Debian Tracker).

Additional resources

Source: This report was generated using AI

Related Apache Traffic Server vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-49763HIGH7.5
  • Apache Traffic ServerApache Traffic Server
  • trafficserver-debuginfo
NoYesJun 19, 2025
CVE-2025-31698HIGH7.5
  • Apache Traffic ServerApache Traffic Server
  • cpe:2.3:a:apache:traffic_server
NoYesJun 19, 2025
CVE-2024-53868HIGH7.5
  • Apache Traffic ServerApache Traffic Server
  • trafficserver
NoYesApr 03, 2025
CVE-2024-56196MEDIUM6.3
  • Apache Traffic ServerApache Traffic Server
  • cpe:2.3:a:apache:traffic_server
NoYesMar 06, 2025
CVE-2024-56195MEDIUM6.3
  • Apache Traffic ServerApache Traffic Server
  • cpe:2.3:a:apache:traffic_server
NoYesMar 06, 2025

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