[PATCH] osxkeychain: restrict queries to requests with a valid host

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make sure that requests to this helper to get credentials return early if
there is no host ord the host is empty.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@xxxxxxxxx>
---
 contrib/credential/osxkeychain/git-credential-osxkeychain.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/contrib/credential/osxkeychain/git-credential-osxkeychain.c b/contrib/credential/osxkeychain/git-credential-osxkeychain.c
index bcd3f575a3..2264a88c41 100644
--- a/contrib/credential/osxkeychain/git-credential-osxkeychain.c
+++ b/contrib/credential/osxkeychain/git-credential-osxkeychain.c
@@ -69,6 +69,12 @@ static void find_internet_password(void)
 	UInt32 len;
 	SecKeychainItemRef item;
 
+	/*
+	 * Require at valid host to fix CVE-2020-11008
+	 */
+	if (!host || !*host)
+		return;
+
 	if (SecKeychainFindInternetPassword(KEYCHAIN_ARGS, &len, &buf, &item))
 		return;
 
-- 
2.26.2.111.gbff22aa583




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