libcurl's URL API function curlurlget() 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.
{ "severity": "Low", "URL": "https://curl.se/docs/CVE-2024-6874.json", "issue": "https://hackerone.com/reports/2604391", "last_affected": "8.8.0", "award": { "amount": "540", "currency": "USD" }, "package": "curl", "CWE": { "desc": "Buffer Over-read", "id": "CWE-126" }, "affects": "lib", "www": "https://curl.se/docs/CVE-2024-6874.html" }