CVE-2021-22901
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 …
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Haxx | Curl | from 7.75.0 through 7.76.1 |
| Oracle | Communications Cloud Native Core Binding Support Function | Version 1.11.0 |
| Oracle | Communications Cloud Native Core Network Function Cloud Native Environment | Version 1.10.0 |
| Oracle | Communications Cloud Native Core Network Repository Function | Versions 1.15.0, 1.15.1 |
| Oracle | Communications Cloud Native Core Network Slice Selection Function | Version 1.8.0 |
| Oracle | Communications Cloud Native Core Service Communication Proxy | Version 1.15.0 |
| Oracle | Essbase | before 11.1.2.4.047 from 21.0 before 21.3 |
| Oracle | Mysql Server | through 5.7.34 from 8.0.0 through 8.0.25 |
| Netapp | Active Iq Unified Manager | All versions |
| Netapp | Cloud Backup | All versions |
| Netapp | Oncommand Insight | All versions |
| Netapp | Oncommand Workflow Automation | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf
- https://curl.se/docs/CVE-2021-22901.html
- https://github.com/curl/curl/commit/7f4a9a9b2a49547eae24d2e19bc5c346e9026479
- https://hackerone.com/reports/1180380
- https://security.netapp.com/advisory/ntap-20210723-0001/
- https://security.netapp.com/advisory/ntap-20210727-0007/
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://cert-portal.siemens.com/productcert/html/ssa-389290.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-732250.html