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CVE-2020-17522

17
FAUCET Score

CVE-2020-17522 describes a vulnerability in Apache Traffic Control versions 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0 where the ORT (now atstccfg) component generates ip_allow.config files with overly permissive settings. This allows unauthorized actors to push or remove arbitrary content from CDN cache servers, potentially extending these permissions to unintended external IP addresses. The vulnerability has a CVSS score of 5.8 (Medium), indicating a network-based attack with low complexity and a potential impact on data integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, <= 3.1.0CPE matchmatch criteria
cpe:2.3:a:apache:traffic_control:*:*:*:*:*:*:*:*
>= 4.0.0, <= 4.1.0CPE matchmatch criteria
cpe:2.3:a:apache:traffic_control:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.8MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.93%
Probability of exploitation in next 30 days
EPSS Percentile
89.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0393 is in the 86th percentile among its peer group of 23,701 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

gopatch availablevia ghsa
Product: github.com/apache/trafficcontrolFixed in: 5.0.0

Vendor Advisories (1)

goGHSA-pw59-4qgf-jxr8medium

Cache Manipulation Attack in Apache Traffic Control

Jun 18, 2021

References

lists.apache.org / thread.html/r3c675031ac220b5eae64a9c84a03ee60045c6045738607dca4a96cb8%40%3Ccommits.trafficcontrol.apache.org%3E
lists.apache.org / thread.html/r3de212a3da73bcf98fa2db7eafb75b2eb8e131ff466e6efc4284df09%40%3Cdev.trafficcontrol.apache.org%3E
Mailing ListVendor Advisory
lists.apache.org / thread.html/rc8bfd7d4f71d61e9193efcd4699eccbab3c202ec1d75ed9d502f08bf%40%3Ccommits.trafficcontrol.apache.org%3E