CVE-2021-22925

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.

Score
CVSS 3.1 5.3 Medium
Status
Modified - support@hackerone.com
Published
2021-08-05
Last modified
2026-10-14
Weaknesses
CWE-200, CWE-908

Affected products

References

 
 
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