From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Wed, 6 May 2020 10:40:36 +0000 (+0300)
Subject: auth: mech-rpa - Fail on zero len buffer
X-Git-Tag: 2.3.11.2~66
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bd9d2fe7da833f0e4705a8280efc56930371806b;p=thirdparty%2Fdovecot%2Fcore.git

auth: mech-rpa - Fail on zero len buffer
---

diff --git a/src/auth/mech-rpa.c b/src/auth/mech-rpa.c
index 08298ebdd6..2de8705b4f 100644
--- a/src/auth/mech-rpa.c
+++ b/src/auth/mech-rpa.c
@@ -224,7 +224,7 @@ rpa_read_buffer(pool_t pool, const unsigned char **data,
 		return 0;
 
 	len = *p++;
-	if (p + len > end)
+	if (p + len > end || len == 0)
 		return 0;
 
 	*buffer = p_malloc(pool, len);