How the curl team handled "CVE-2024-9681: HSTS subdomain overwrites parent cache entry"

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gvlx

gvlx

Member
Feb 22, 2024
17
3
Lisboa, Portugal
masto.pt
Hi,

This is an interesting, minor problem, with HSTS management in curl

Beginner friendly, easy to follow, CVE analysis and resolution.

hackerone.com

curl disclosed on HackerOne: CVE-2024-9681: HSTS subdomain...

## Summary: Suppose my HSTS cache file has the following content: ``` .domain.com "20241107 01:02:03" .sub.domain.com "unlimited" ``` Now, I connect to https://sub.domain.com/. Suppose this domain now sets a HSTS policy: `Strict-Transport-Security: max-age=15768000 ; includeSubDomains`...
hackerone.com

Best regards,
 
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