CVE-2020-17522When ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0, those files…
- 5.8MediumCVSS base score
- 4.0%Exploitation in 30 daysEPSS · top 9.3% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
When ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0, those files include permissions that allow bad actors to push arbitrary content into and remove arbitrary content from CDN cache servers. Additionally, these permissions are potentially extended to IP addresses outside the desired range, resulting in them being granted to clients possibly outside the CDN arcitechture.
Timeline
ID reserved
By apache
- 6 months later
· 6 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 4.0% · top 9.3% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.8.
Affected products
Apache Traffic Control
- affected Traffic Control 3.0.0 to 3.1.0, 4.0.0 to 4.1.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/apache/trafficcontrolGHSA-pw59-4qgf-jxr8 (opens in a new tab)
References
References3
- https://lists.apache.org/thread.html/r3de212a3da73bcf98fa2db7eafb75b2eb8e131ff466e6efc4284df09%40%3Cdev.trafficcontrol.apache.org%3E (opens in a new tab)x_refsource_MISCx_transferred
- [trafficcontrol-commits] 20210616 [trafficcontrol-website] branch asf-site updated: Fix CVE-2020-17522 link (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [trafficcontrol-commits] 20211011 [trafficcontrol-website] 01/02: Add CVE-2021-42009 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-1372 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-pw59-4qgf-jxr8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-17522)Record last updated .