macidn punycode buffer overread
libcurl's URL API function [curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode conversions, to and from IDN. Asking to convert a name that is exactly 256 bytes, libcurl ends up reading outside of a stack based buffer when built to use the *macidn* IDN backend. The conversion function then fills up the provided buffer exactly - but does not null-terminate the string. This flaw can lead to stack contents accidentally getting returned as part of the converted string.
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Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-6874US | medium4.3 | — | ||
libcurl's URL API function
[curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode
conversions, to and from IDN. Asking to convert a name that is exactly 256… | ||||
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