CVE-2021-43350 LDAP filter injection vulnerability in Traffic Ops

What is CVE-2021-43350?

CVE-2021-43350 is a critical vulnerability in Apache Traffic Control, published on 11 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An unauthenticated Apache Traffic Control Traffic Ops user can send a request with a specially-crafted username to the POST /login endpoint of any API version to inject unsanitized content into the LDAP filter.

Weakness: CWE-74, CWE-90

Which versions are affected by CVE-2021-43350?

5 open source packages ship an affected version, including github.com/apache/trafficcontrol. It affects 1 product.

Products include Apache Traffic Control.

How do I fix CVE-2021-43350?

Upgrade github.com/apache/trafficcontrol to a fixed version for your release line: 5.1.4, 5.1.4+incompatible, 6.0.1+incompatible or 6.0.1.

Is CVE-2021-43350 being exploited?

There is no known exploitation of CVE-2021-43350 in the wild and no public exploit code.

Other vulnerabilities in Apache Traffic Control

• CVE-2024-45387 Apache Traffic Control: SQL Injection in Traffic Ops endpoint PUT deliveryservice_request_comments Critical 9.9
• CVE-2019-12405 Improper Authentication in Apache Traffic Control Critical 9.8
• CVE-2025-61581 Apache Traffic Control: ReDoS issue in Traffic Router configuration High 7.5
• CVE-2022-23206 Server-Side Request Forgery in Traffic Ops endpoint POST /user/login/oauth High 7.5
• CVE-2017-7670 Apache Traffic Control vulnerable to Slowloris-style Denial of Service attack High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-mg2c-rc36-p594, GO-2024-2776.