CVE-2021-32567
HIGHCVSS 7.5/10EPSS 2.45%
Last modified
CVE-2021-32567 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.. EPSS estimates a 2.45% chance of exploitation in the next 30 days.
Description
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Traffic Server | >= 7.0.0, <= 7.1.12 |
| Apache | Traffic Server | >= 8.0.0, <= 8.1.1 |
| Apache | Traffic Server | >= 9.0.0, <= 9.0.1 |
| Debian | Debian Linux | 10.0 |
References
- https://www.debian.org/security/2021/dsa-4957Third Party Advisory
- https://www.debian.org/security/2021/dsa-4957Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-32567?
Improper Input Validation vulnerability in HTTP/2 of Apache Traffic Server allows an attacker to DOS the server. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
How severe is CVE-2021-32567?
CVE-2021-32567 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.45% probability of exploitation in the next 30 days.
How do I fix CVE-2021-32567?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-32567?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST