CVE-2021-40491
6.5 · MEDIUMOverview
CVE-2021-40491 is a medium-severity vulnerability affecting gnu inetutils. It was published on September 3, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The ftp client in GNU Inetutils before 2.2 does not validate addresses returned by PASV/LSPV responses to make sure they match the server address. This is similar to CVE-2020-8284 for curl.
Remediation
Check the references section for vendor advisories and patches from gnu. Update inetutils to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| gnu | inetutils | >= 0, < 2.2 | Affected |
References
Frequently Asked Questions
What is CVE-2021-40491?
CVE-2021-40491 is a medium-severity vulnerability affecting gnu inetutils. It was published on September 3, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2021-40491?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-40491?
Check the references section for vendor advisories and patches from gnu. Update inetutils to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-40491?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-40491 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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