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From 187d0795030ccb4f410eb6089e265ac3571e56dd Mon Sep 17 00:00:00 2001
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From: Daniel Stenberg <daniel@haxx.se>
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Date: Mon, 25 Apr 2022 11:48:00 +0200
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Subject: [PATCH] conncache: include the zone id in the "bundle" hashkey
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Make connections to two separate IPv6 zone ids create separate
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connections.
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Reported-by: Harry Sintonen
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Bug: https://curl.se/docs/CVE-2022-27775.html
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Closes #8747
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Upstream-commit: 058f98dc3fe595f21dc26a5b9b1699e519ba5705
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Signed-off-by: Kamil Dudka <kdudka@redhat.com>
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---
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lib/conncache.c | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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diff --git a/lib/conncache.c b/lib/conncache.c
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index cd5756a..9b9f683 100644
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--- a/lib/conncache.c
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+++ b/lib/conncache.c
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@@ -159,8 +159,12 @@ static void hashkey(struct connectdata *conn, char *buf,
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/* report back which name we used */
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*hostp = hostname;
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- /* put the number first so that the hostname gets cut off if too long */
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- msnprintf(buf, len, "%ld%s", port, hostname);
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+ /* put the numbers first so that the hostname gets cut off if too long */
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+#ifdef ENABLE_IPV6
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+ msnprintf(buf, len, "%u/%ld/%s", conn->scope_id, port, hostname);
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+#else
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+ msnprintf(buf, len, "%ld/%s", port, hostname);
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+#endif
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}
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/* Returns number of connections currently held in the connection cache.
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--
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2.34.1
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