CVE catalog

CVE-2020-17509

trafficserver: CVE-2020-17509

Severity: Medium
Published: Jan 11, 2021, 10:15:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.81% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	trafficserver	bookworm	`9.2.5+ds-0+deb12u4`	fixed
Debian	trafficserver	bookworm-security	`9.2.5+ds-0+deb12u4`	fixed
Ubuntu	trafficserver	16.04	`5.3.0-2ubuntu1`	vulnerable
Ubuntu	trafficserver	16.04	`5.3.0-2ubuntu2`	vulnerable
Ubuntu	trafficserver	18.04	`7.0.0-5`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-2`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-2build1`	vulnerable
Ubuntu	trafficserver	18.04	`7.1.2+ds-3`	vulnerable
Ubuntu	trafficserver	pro	`8.0.5+ds-1`	vulnerable
Ubuntu	trafficserver	pro	`8.0.5+ds-2`	vulnerable
Ubuntu	trafficserver	pro	`8.0.5+ds-2build1`	vulnerable
Ubuntu	trafficserver	pro	`8.0.5+ds-2ubuntu1`	vulnerable
Ubuntu	trafficserver	pro	`8.0.5+ds-3`	vulnerable
Ubuntu	trafficserver	pro	`8.0.5+ds-3ubuntu0.1~esm1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	trafficserver	source	bookworm	`8.1.1+ds-1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[trafficserver]Fixed
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
[trafficserver-dev]Fixed
Source package: [trafficserver]
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
[trafficserver-experimental-plugins]Fixed
Source package: [trafficserver]
Details (4)
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12
- 9.2.5+ds-0+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 8.1.1+ds-1
  dsa · trafficserver · debian · bookworm; dsa · trafficserver · debian · 12

Observed: Oct 23, 2026, 5:48:52 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]