Vulnerability in Apache Traffic Server

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.

Vulnerability class: HTTP Request Smuggling

EPSS: 0.018 (76.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

  • Apache Traffic_server
  • N/a Apache Traffic Server — versions Apache Traffic Server 7.0.0 to 7.1.11, 8.0.0 to 8.1.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-17509?
CVE-2020-17509 is a high-severity vulnerability in Apache Traffic Server, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.5/10. Published 2021-01-11.
How severe is CVE-2020-17509?
High severity. CVSS v3 base score is 7.5 out of 10.