CVE-2021-22924

Public Exploit

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.

Categories

3.7
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.71% Top 30%
Vendor Advisory fedoraproject.org Vendor Advisory debian.org
Affected: n/a https://github.com/curl/curl
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/1223565 issue tracking patch exploit third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRUCW2UVNYUDZF72DQLFQR4PJEC6CF7V/ mailing list third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00017.html third party advisory mailing list
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3E third party advisory mailing list
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3E third party advisory mailing list
https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cusers.kafka.apache.org%3E third party advisory mailing list
https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3E third party advisory mailing list
https://www.oracle.com/security-alerts/cpuoct2021.html third party advisory patch
https://security.netapp.com/advisory/ntap-20210902-0003/ third party advisory
https://www.oracle.com/security-alerts/cpujan2022.html third party advisory patch
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf third party advisory patch
https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf third party advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf third party advisory
https://www.debian.org/security/2022/dsa-5197 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-22924?
CVE-2021-22924 has been scored as a low severity vulnerability.
How to fix CVE-2021-22924?
To fix CVE-2021-22924, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22924 being actively exploited in the wild?
It is possible that CVE-2021-22924 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22924?
CVE-2021-22924 affects n/a https://github.com/curl/curl.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.