CVE-2021-22924
3.7 · LOWOverview
CVE-2021-22924 is a low-severity vulnerability affecting haxx libcurl. It was published on August 5, 2021 and has a CVSS 3.1 base score of 3.7 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches the setup.Due to errors in the logic, the config matching function did not take 'issuercert' into account and it compared the involved paths *case insensitively*,which could lead to libcurl reusing wrong connections.File paths are, or can be, case sensitive on many systems but not all, and caneven vary depending on used file systems.The comparison also didn't include the 'issuer cert' which a transfer can setto qualify how to verify the server certificate.
Remediation
Check the references section for vendor advisories and patches from haxx. Update libcurl 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 |
|---|---|---|---|
| haxx | libcurl | >= 7.10.4, < 7.77.0 | Affected |
| oracle | mysql_server | 5.7.0 | Affected |
| siemens | sinec_infrastructure_network_services | >= 0, < 1.0.1.1 | Affected |
| siemens | sinema_remote_connect_server | >= 0, < 3.1 | Affected |
| siemens | ruggedcomrm_1224_lte_firmware | >= 0, < 7.1 | Affected |
| siemens | scalance_m804pb_firmware | >= 0, < 7.1 | Affected |
| siemens | scalance_m812-1_firmware | >= 0, < 7.1 | Affected |
References
Frequently Asked Questions
What is CVE-2021-22924?
CVE-2021-22924 is a low-severity vulnerability affecting haxx libcurl. It was published on August 5, 2021 and has a CVSS 3.1 base score of 3.7 (LOW).
How severe is CVE-2021-22924?
This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-22924?
Check the references section for vendor advisories and patches from haxx. Update libcurl 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-2021-22924?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-22924 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.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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