Patch-Source: https://github.com/curl/curl/commit/058f98dc3fe595f21dc26a5b9b1699e519ba5705 From 058f98dc3fe595f21dc26a5b9b1699e519ba5705 Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Mon, 25 Apr 2022 11:48:00 +0200 Subject: [PATCH] conncache: include the zone id in the "bundle" hashkey Make connections to two separate IPv6 zone ids create separate connections. Reported-by: Harry Sintonen Bug: https://curl.se/docs/CVE-2022-27775.html Closes #8747 --- lib/conncache.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/conncache.c b/lib/conncache.c index ec669b971dc3..8948b53fa500 100644 --- a/lib/conncache.c +++ b/lib/conncache.c @@ -155,8 +155,12 @@ static void hashkey(struct connectdata *conn, char *buf, /* report back which name we used */ *hostp = hostname; - /* put the number first so that the hostname gets cut off if too long */ - msnprintf(buf, len, "%ld%s", port, hostname); + /* put the numbers first so that the hostname gets cut off if too long */ +#ifdef ENABLE_IPV6 + msnprintf(buf, len, "%u/%ld/%s", conn->scope_id, port, hostname); +#else + msnprintf(buf, len, "%ld/%s", port, hostname); +#endif Curl_strntolower(buf, buf, len); }