CVE-2024-6874

Summary

libcurl's URL API function curl_url_get() 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.

Affected Software

Weaknesses

• CWE-126 Buffer Over-read

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

CVE Program Container

Additional References

• https://curl.se/docs/CVE-2024-6874.json
• https://curl.se/docs/CVE-2024-6874.html
• https://hackerone.com/reports/2604391
• http://www.openwall.com/lists/oss-security/2024/07/24/2
• https://security.netapp.com/advisory/ntap-20240822-0004/

References

• https://curl.se/docs/CVE-2024-6874.json
• https://curl.se/docs/CVE-2024-6874.html
• https://hackerone.com/reports/2604391
• http://www.openwall.com/lists/oss-security/2024/07/24/2

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