CVE-2020-17509
HIGHCVSS 7.5/10EPSS 1.79%
Last modified
CVE-2020-17509 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. EPSS estimates a 1.79% chance of exploitation in the next 30 days.
Description
ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Traffic Server | >= 6.0.0, <= 6.2.3 |
| Apache | Traffic Server | >= 7.0.0, <= 7.1.10 |
| Apache | Traffic Server | >= 8.0.0, <= 8.0.7 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-17509?
ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.
How severe is CVE-2020-17509?
CVE-2020-17509 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.79% probability of exploitation in the next 30 days.
How do I fix CVE-2020-17509?
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.
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Are you affected by CVE-2020-17509?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST