In curl prior to 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
haxx curl |
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fedoraproject fedora 35 |
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fedoraproject fedora 36 |
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fedoraproject fedora 37 |
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apple macos |
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splunk universal forwarder 9.1.0 |
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splunk universal forwarder |
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