Vulnerability CVE-2021-22901: Information
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.
Severity: HIGH (8.1) Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| MySQL | sisyphus | 8.0.26-alt1 | 8.0.37-alt1.1 | ALT-PU-2021-2461-1 | 281108 | Fixed |
| MySQL | sisyphus_riscv64 | 8.0.27-alt1.0.rv64 | 8.0.37-alt0.port | ALT-PU-2021-4503-1 | - | Fixed |
| MySQL | p10 | 8.0.26-alt1 | 8.0.36-alt1 | ALT-PU-2021-2477-1 | 282098 | Fixed |
| MySQL | p9 | 8.0.26-alt1 | 8.0.26-alt2 | ALT-PU-2021-2571-1 | 282101 | Fixed |
| MySQL | c10f1 | 8.0.26-alt1 | 8.0.37-alt1 | ALT-PU-2021-2477-1 | 282098 | Fixed |
| MySQL | c9f2 | 8.0.26-alt2 | 8.0.36-alt0.c9.1 | ALT-PU-2021-3668-1 | 291746 | Fixed |
| MySQL | p11 | 8.0.26-alt1 | 8.0.37-alt1.1 | ALT-PU-2021-2461-1 | 281108 | Fixed |
| curl | sisyphus | 7.77.0-alt1 | 8.7.1-alt2 | ALT-PU-2021-1865-1 | 272616 | Fixed |
| curl | p10 | 7.77.0-alt1 | 8.7.1-alt2 | ALT-PU-2021-1865-1 | 272616 | Fixed |
| curl | p9 | 7.77.0-alt1 | 7.79.0-alt2 | ALT-PU-2021-1911-1 | 272617 | Fixed |
| curl | c10f1 | 7.77.0-alt1 | 8.6.0-alt1 | ALT-PU-2021-1865-1 | 272616 | Fixed |
| curl | c9f2 | 7.77.0-alt1 | 8.6.0-alt1 | ALT-PU-2021-2146-1 | 276672 | Fixed |
| curl | p11 | 7.77.0-alt1 | 8.7.1-alt2 | ALT-PU-2021-1865-1 | 272616 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| https://curl.se/docs/CVE-2021-22901.html |
|
| https://hackerone.com/reports/1180380 |
|
| https://github.com/curl/curl/commit/7f4a9a9b2a49547eae24d2e19bc5c346e9026479 |
|
| N/A |
|
| https://security.netapp.com/advisory/ntap-20210723-0001/ |
|
| https://security.netapp.com/advisory/ntap-20210727-0007/ |
|
| https://www.oracle.com/security-alerts/cpujan2022.html |
|
| https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf |
|
| https://www.oracle.com/security-alerts/cpuapr2022.html |
|
| https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdf |
|