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urlapi: reject more bad characters from the host name field

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Extended test 1560 to verify

Report from the ongoing source code audit by Trail of Bits.

Closes #9608
This commit is contained in:
Daniel Stenberg 2022-09-27 17:48:08 +02:00
parent 267668308b
commit eb0167ff7d
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2 changed files with 21 additions and 1 deletions
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lib/urlapi.c
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@ -637,7 +637,7 @@ static CURLUcode hostname_check(struct Curl_URL *u, char *hostname,
}
else {
/* letters from the second string are not ok */
len = strcspn(hostname, " \r\n\t/:#?!@");
len = strcspn(hostname, " \r\n\t/:#?!@{}[]\\$\'\"^`*<>=;,");
if(hlen != len)
/* hostname with bad content */
return CURLUE_BAD_HOSTNAME;