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From 40811ab7571ddf0a6905b3b019229bdb555bd04d Mon Sep 17 00:00:00 2001
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From: William Brown <firstyear@redhat.com>
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Date: Tue, 7 Nov 2017 12:42:11 +1000
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Subject: [PATCH] Ticket 49377 - Incoming BER too large with TLS on plain port
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Bug Description: When doing TLS to a plain port, a message of
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"ber element 3 bytes too large for max ber" when max ber > 3.
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Fix Description: When ber_len < maxber, report that the request
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may be misformed instead of "oversize" instead. This can lead
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to a better diagnosis.
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https://pagure.io/389-ds-base/issue/49377
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Author: wibrown
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Review by: mreynolds (thanks!)
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Cherry picked from commit b3629af054760d9421a41d63b8b8ed513bb6944d
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---
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ldap/servers/slapd/connection.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/ldap/servers/slapd/connection.c b/ldap/servers/slapd/connection.c
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index 3f19b9765..8ef115691 100644
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--- a/ldap/servers/slapd/connection.c
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+++ b/ldap/servers/slapd/connection.c
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@@ -2176,6 +2176,13 @@ log_ber_too_big_error(const Connection *conn, ber_len_t ber_len, ber_len_t maxbe
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" is %" BERLEN_T " bytes. Change the nsslapd-maxbersize attribute in"
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" cn=config to increase.\n",
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conn->c_connid, conn->c_sd, maxbersize);
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+ } else if (ber_len < maxbersize) {
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+ /* This means the request was misformed, not too large. */
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+ slapi_log_err(SLAPI_LOG_ERR, "log_ber_too_big_error",
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+ "conn=%" PRIu64 " fd=%d Incoming BER Element may be misformed. "
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+ "This may indicate an attempt to use TLS on a plaintext port, "
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+ "IE ldaps://localhost:389. Check your client LDAP_URI settings.\n",
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+ conn->c_connid, conn->c_sd);
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} else {
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slapi_log_err(SLAPI_LOG_ERR, "log_ber_too_big_error",
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"conn=%" PRIu64 " fd=%d Incoming BER Element was %" BERLEN_T " bytes, max allowable"
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--
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2.13.6
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