CVE-2021-42009: apache software foundation apache traffic control Improper Input Validation
Vulnerability summary
CVE-2021-42009 is a medium (CVSS 4.3) Improper Input Validation vulnerability in apache software foundation apache traffic control. EPSS estimates a 2.82% chance of exploitation in the next 30 days, higher than 86.4% of scored vulnerabilities.
Timeline
- 12-10-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An authenticated Apache Traffic Control Traffic Ops user with Portal-level privileges can send a request with a specially-crafted email subject to the /deliveryservices/request Traffic Ops endpoint to send an email, from the Traffic Ops server, with an arbitrary body to an arbitrary email address. Apache Traffic Control 5.1.x users should upgrade to 5.1.3 or 6.0.0. 4.1.x users should upgrade to 5.1.3.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · GoEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
2.82%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
0.00 pp
From 2.82% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apache1 product
- traffic_control≥ 4.1.0, < 5.1.3
Apache software foundation1 product
- apache traffic control≥ 4.0.0, < Apache Traffic Control*
Github.com/apache1 product
- trafficcontrol< 5.1.3 | < 5.1.3+incompatible
3 vendors · 3 products
References
10 links- www.openwall.com/lists/oss-security/2021/10/12/1Mailing ListX Refsource MLISTWEBThird Party Advisory
