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CVE-2024-6874

Date: July 24, 2024

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.

Language: C

Severity Score

Related Resources (9)

https://security.alpinelinux.org/vuln/CVE-2024-6874
https://hackerone.com/reports/2604391
https://nvd.nist.gov/vuln/detail/CVE-2024-6874
https://security.netapp.com/advisory/ntap-20240822-0004/
https://curl.se/docs/CVE-2024-6874.json
http://www.openwall.com/lists/oss-security/2024/07/24/2
https://security-tracker.debian.org/tracker/CVE-2024-6874
https://curl.se/docs/CVE-2024-6874.html
https://www.mend.io/vulnerability-database/CVE-2024-6874

Severity Score

Weakness Type (CWE)

Out-of-bounds Read

CWE-125

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

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