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    CVE-2024-6874

    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.

    Published:Jul 24, 2024
    Last Modified:Feb 13, 2025
    EPS:Jul 24, 2024
    EPSS Score:0.00731
    CVSS Score:3.1

    Affected Products

    Vendor
    Curl
    Product
    Libcurl
    Vendor
    Haxx
    Product
    Libcurl

    Exploits

    https://hackerone.com/reports/2604391https://hackerone.com/reports/2604391

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High