Updated: 2025-08-20 00:11:12.730444
Description:
curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | MEDIUM | 5.0 |
| CVSS Version 3.x | MEDIUM | 5.3 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| Debian 10 ELS | curl | 7.64.0 | 5.3 | MEDIUM | Ignored | 2025-10-11 00:23:38 | Ignored due to low severity | |
| Oracle Linux 6 ELS | mysql | 5.1.73 | 5.3 | MEDIUM | Ignored | 2022-07-18 11:44:12 | Ignored due to low severity | |
| Oracle Linux 6 ELS | curl | 7.19.7 | 5.3 | MEDIUM | Released | CLSA-2021:1634922517 | 2022-03-10 14:51:08 | Ignored due to low severity |
| Ubuntu 16.04 ELS | curl | 7.47.0 | 5.3 | MEDIUM | Released | CLSA-2021:1635459174 | 2022-03-10 14:51:08 | |
| Ubuntu 16.04 ELS | mysql-5.7 | 5.7.33-0 | 5.3 | MEDIUM | Not Vulnerable | 2023-03-13 14:12:25 | ||
| Ubuntu 18.04 ELS | mysql-5.7 | 5.7.41-0 | 5.3 | MEDIUM | Ignored | 2023-07-10 03:59:58 | Ignored due to low severity | |
| Ubuntu 18.04 ELS | curl | 7.58.0-2 | 5.3 | MEDIUM | Ignored | 2023-03-02 04:04:20 | Ignored due to low severity |