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

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.018 (77.6th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2020-17509: held from 0.018 to 0.018.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

  • Apache Traffic Server
  • 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.