Executive Summary
Informations | |||
---|---|---|---|
Name | CVE-2021-22901 | First vendor Publication | 2021-06-11 |
Vendor | Cve | Last vendor Modification | 2024-11-21 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | |||
---|---|---|---|
Overall CVSS Score | 8.1 | ||
Base Score | 8.1 | Environmental Score | 8.1 |
impact SubScore | 5.9 | Temporal Score | 8.1 |
Exploitabality Sub Score | 2.2 | ||
Attack Vector | Network | Attack Complexity | High |
Privileges Required | None | User Interaction | None |
Scope | Unchanged | Confidentiality Impact | High |
Integrity Impact | High | Availability Impact | High |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P) | |||
---|---|---|---|
Cvss Base Score | 6.8 | Attack Range | Network |
Cvss Impact Score | 6.4 | Attack Complexity | Medium |
Cvss Expoit Score | 8.6 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
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. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22901 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
100 % | CWE-416 | Use After Free |
CPE : Common Platform Enumeration
Sources (Detail)
Alert History
Date | Informations |
---|---|
2024-11-28 13:52:49 |
|
2024-03-27 17:28:09 |
|
2023-08-25 13:06:52 |
|
2022-10-07 02:05:26 |
|
2022-05-13 21:27:36 |
|
2022-05-10 17:23:03 |
|
2022-04-20 09:23:18 |
|
2022-04-06 21:23:12 |
|
2022-03-10 21:23:23 |
|
2022-03-04 21:23:16 |
|
2022-02-07 21:23:16 |
|
2021-08-04 21:23:22 |
|
2021-07-30 21:23:21 |
|
2021-07-23 17:22:57 |
|
2021-07-21 05:22:55 |
|
2021-06-22 21:23:12 |
|
2021-06-11 21:23:07 |
|