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.
Does this matter?
Lower severity and a low EPSS score (0.79%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.79% probability · 54th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- haxx/libcurl
- Source
- 2499f714-1537-4658-8207-48ae4bb9eae9
References
- http://www.openwall.com/lists/oss-security/2024/07/24/2Mailing List, Third Party Advisory
- https://curl.se/docs/CVE-2024-6874.htmlVendor Advisory
- https://curl.se/docs/CVE-2024-6874.jsonVendor Advisory
- https://hackerone.com/reports/2604391Exploit, Issue Tracking, Technical Description
- http://www.openwall.com/lists/oss-security/2024/07/24/2Mailing List, Third Party Advisory
- https://curl.se/docs/CVE-2024-6874.htmlVendor Advisory
- https://curl.se/docs/CVE-2024-6874.jsonVendor Advisory
- https://hackerone.com/reports/2604391Exploit, Issue Tracking, Technical Description
- https://security.netapp.com/advisory/ntap-20240822-0004/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.