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3.1Low

CVE-2024-6874macidn punycode buffer overread

curl curl; curl libcurl Published: (2 years ago)

Description

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 accidently getting returned as part of the converted string.

Weakness (CWE): CWE-126

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
curl curl 8.8.0 – ≤ 8.8.0
curl libcurl 8.8.0

References and patches

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