p PatchFirst

CVE-2024-6874

CVE-2024-6874 · macidn punycode buffer overread

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 3.1 · Low · EPSS 0.8% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • curl

    Versions
    • ≥ 8.8.0, ≤ 8.8.0: Affected (semver)

    No fix published

  • curl Debian:13

    Affected ranges
    • ECOSYSTEM: < 8.9.0-1

    Update to 8.9.0-1

  • curl Debian:14

    Affected ranges
    • ECOSYSTEM: < 8.9.0-1

    Update to 8.9.0-1

Original sources

Check your server →