CVE-2024-6874

Public Exploit
macidn punycode buffer overread

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.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.24%
Vendor Advisory curl.se Vendor Advisory curl.se
Affected: curl curl
Published at:
Updated at:

References

Link Tags
https://curl.se/docs/CVE-2024-6874.json vendor advisory
https://curl.se/docs/CVE-2024-6874.html vendor advisory
https://hackerone.com/reports/2604391 issue tracking exploit technical description
http://www.openwall.com/lists/oss-security/2024/07/24/2 third party advisory mailing list
https://security.netapp.com/advisory/ntap-20240822-0004/

Frequently Asked Questions

What is the severity of CVE-2024-6874?
CVE-2024-6874 has been scored as a medium severity vulnerability.
How to fix CVE-2024-6874?
To fix CVE-2024-6874, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-6874 being actively exploited in the wild?
It is possible that CVE-2024-6874 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-6874?
CVE-2024-6874 affects curl curl.
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