vulnerability
Ubuntu: (CVE-2020-17509): trafficserver vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:N/I:P/A:N) | Jan 11, 2021 | Jun 26, 2025 | Mar 27, 2026 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
Jan 11, 2021
Added
Jun 26, 2025
Modified
Mar 27, 2026
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.
Solution
no-fix-ubuntu-package
References
- CVE-2020-17509
- https://attackerkb.com/topics/CVE-2020-17509
- CWE-444
- EUVD-EUVD-2020-9457
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-9457
- https://github.com/apache/trafficserver/pull/7359
- https://lists.apache.org/thread.html/raa9f0589c26c4d146646425e51e2a33e1457492df9f7ea2019daa6d3%40%3Cdev.trafficserver.apache.org%3E
- https://www.cve.org/CVERecord?id=CVE-2020-17509
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.