Blame SOURCES/dovecot-2.3.13-CVE_2020_25275-part4.patch

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From 62061e8cf68f506c0ccaaba21fd4174764ca875f Mon Sep 17 00:00:00 2001
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From: Timo Sirainen <timo.sirainen@open-xchange.com>
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Date: Mon, 17 Aug 2020 18:15:35 +0300
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Subject: [PATCH] imap-login: Split off client_invalid_command()
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---
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 src/imap-login/imap-login-client.c | 27 +++++++++++++++++----------
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 1 file changed, 17 insertions(+), 10 deletions(-)
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diff --git a/src/imap-login/imap-login-client.c b/src/imap-login/imap-login-client.c
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index e2af176309..ce5049d567 100644
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--- a/src/imap-login/imap-login-client.c
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+++ b/src/imap-login/imap-login-client.c
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@@ -194,6 +194,22 @@ static int client_command_execute(struct imap_client *client, const char *cmd,
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 	return login_cmd->func(client, args);
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 }
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+static bool client_invalid_command(struct imap_client *client)
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+{
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+	if (*client->cmd_tag == '\0')
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+		client->cmd_tag = "*";
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+	if (++client->common.bad_counter >= CLIENT_MAX_BAD_COMMANDS) {
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+		client_send_reply(&client->common, IMAP_CMD_REPLY_BYE,
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+				  "Too many invalid IMAP commands.");
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+		client_destroy(&client->common,
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+			       "Disconnected: Too many invalid commands");
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+		return FALSE;
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+	}
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+	client_send_reply(&client->common, IMAP_CMD_REPLY_BAD,
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+			  "Error in IMAP command received by server.");
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+	return TRUE;
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+}
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+
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 static bool imap_is_valid_tag(const char *tag)
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 {
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 	for (; *tag != '\0'; tag++) {
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@@ -326,17 +342,8 @@ static bool imap_client_input_next_cmd(struct client *_client)
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 			"not the command name. Add that before the command, "
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 			"like: a login user pass");
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 	} else if (ret < 0) {
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-		if (*client->cmd_tag == '\0')
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-			client->cmd_tag = "*";
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-		if (++client->common.bad_counter >= CLIENT_MAX_BAD_COMMANDS) {
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-			client_send_reply(&client->common, IMAP_CMD_REPLY_BYE,
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-				"Too many invalid IMAP commands.");
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-			client_destroy(&client->common,
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-				"Disconnected: Too many invalid commands");
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+		if (!client_invalid_command(client))
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 			return FALSE;
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-		}
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-		client_send_reply(&client->common, IMAP_CMD_REPLY_BAD,
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-			"Error in IMAP command received by server.");
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 	}
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 	return ret != 0 && !client->common.destroyed;