Vulnerability Description
curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Curl | >= 7.75.0, <= 7.76.1 |
| Oracle | Communications Cloud Native Core Binding Support Function | 1.11.0 |
| Oracle | Communications Cloud Native Core Network Function Cloud Native Environment | 1.10.0 |
| Oracle | Communications Cloud Native Core Network Repository Function | 1.15.0 |
| Oracle | Communications Cloud Native Core Network Slice Selection Function | 1.8.0 |
| Oracle | Communications Cloud Native Core Service Communication Proxy | 1.15.0 |
| Oracle | Essbase | < 11.1.2.4.047 |
| Oracle | Mysql Server | <= 5.7.34 |
| Netapp | Active Iq Unified Manager | - |
| Netapp | Cloud Backup | - |
| Netapp | Oncommand Insight | - |
| Netapp | Oncommand Workflow Automation | - |
| Netapp | Snapcenter | - |
| Netapp | Solidfire\, Enterprise Sds \& Hci Storage Node | - |
| Netapp | Solidfire \& Hci Management Node | - |
| Netapp | Solidfire Baseboard Management Controller Firmware | - |
| Netapp | Hci Compute Node Firmware | - |
| Netapp | Hci Compute Node | - |
| Netapp | H300E Firmware | - |
| Netapp | H300E | - |
Related Weaknesses (CWE)
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdfThird Party Advisory
- https://curl.se/docs/CVE-2021-22901.htmlExploitPatchVendor Advisory
- https://github.com/curl/curl/commit/7f4a9a9b2a49547eae24d2e19bc5c346e9026479PatchThird Party Advisory
- https://hackerone.com/reports/1180380ExploitIssue TrackingThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210723-0001/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210727-0007/Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatchThird Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatchThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdfThird Party Advisory
- https://curl.se/docs/CVE-2021-22901.htmlExploitPatchVendor Advisory
- https://github.com/curl/curl/commit/7f4a9a9b2a49547eae24d2e19bc5c346e9026479PatchThird Party Advisory
- https://hackerone.com/reports/1180380ExploitIssue TrackingThird Party Advisory
FAQ
What is CVE-2021-22901?
CVE-2021-22901 is a vulnerability with a CVSS score of 8.1 (HIGH). curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use ...
How severe is CVE-2021-22901?
CVE-2021-22901 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22901?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Curl, Oracle Communications Cloud Native Core Binding Support Function, Oracle Communications Cloud Native Core Network Function Cloud Native Environment, Oracle Communications Cloud Native Core Network Repository Function, Oracle Communications Cloud Native Core Network Slice Selection Function.