Wiz
Vulnerability DatabaseCVE-2021-35474

CVE-2021-35474: 
Apache Traffic Server vulnerability analysis and mitigation

Overview

Stack-based Buffer Overflow vulnerability was discovered in the cachekey plugin of Apache Traffic Server. The vulnerability affects Apache Traffic Server versions 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, and 9.0.0 to 9.0.1 (NVD, CVE).

Technical details

The vulnerability is classified as a Stack-based Buffer Overflow (CWE-121) and Out-of-bounds Write (CWE-787). It received 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, indicating network accessibility, low attack complexity, no privileges required, and no user interaction needed (NVD).

Impact

Given the CVSS score of 9.8 (CRITICAL), this vulnerability can lead to complete compromise of system confidentiality, integrity, and availability. The network accessibility and lack of required privileges or user interaction make this vulnerability particularly severe (NVD).

Mitigation and workarounds

Debian has released security updates to address this vulnerability in their distributions. For the stable distribution (buster), these problems have been fixed in version 8.0.2+ds-1+deb10u5. Users are strongly recommended to upgrade their trafficserver packages (Debian Advisory).

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
NoYesJun 19, 2025
CVE-2025-31698HIGH7.5
  • Apache Traffic ServerApache Traffic Server
  • trafficserver
NoYesJun 19, 2025
CVE-2024-53868HIGH7.5
  • Apache Traffic ServerApache Traffic Server
  • trafficserver-perl
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
  • trafficserver
NoYesMar 06, 2025

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Additional Wiz resources

Cloud Vulnerability DB

Cloud Vulnerability DB

A community-led vulnerabilities database

Cloud Threat Landscape

Cloud Threat Landscape

A threat intelligence database

PEACH

PEACH

A tenant isolation framework

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management
Get a demo