| Severity |
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| Remote |
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| Type |
| - |
Unknown |
| + |
Information disclosure |
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| Description |
| + |
A security issue has been found in curl before version 7.77.0. curl supports the -t command line option, known as CURLOPT_TELNETOPTIONS in libcurl. This rarely used option is used to send variable=content pairs to TELNET servers. Due to flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server. Therefore potentially revealing sensitive internal information to the server using a clear-text network protocol. |
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| References |
| + |
https://curl.se/docs/CVE-2021-22898.html |
| + |
https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde |
|
| Notes |
| + |
Workaround |
| + |
========== |
| + |
|
| + |
The flaw can be mitigated by avoiding to use the -t command line option and CURLOPT_TELNETOPTIONS. |
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