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From 1d7bcc866591aba5788dc6c701ef8b564d09e329 Mon Sep 17 00:00:00 2001
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From: Daniel Stenberg <daniel@haxx.se>
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Date: Tue, 6 Mar 2018 23:02:16 +0100
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Subject: [PATCH] openldap: check ldap_get_attribute_ber() results for NULL
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before using
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CVE-2018-1000121
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Reported-by: Dario Weisser
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Bug: https://curl.haxx.se/docs/adv_2018-97a2.html
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Upstream-commit: 9889db043393092e9d4b5a42720bba0b3d58deba
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Signed-off-by: Kamil Dudka <kdudka@redhat.com>
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---
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lib/openldap.c | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/lib/openldap.c b/lib/openldap.c
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index 369309c..d71946d 100644
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--- a/lib/openldap.c
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+++ b/lib/openldap.c
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@@ -435,7 +435,7 @@ static ssize_t ldap_recv(struct connectdata *conn, int sockindex, char *buf,
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for(ent = ldap_first_message(li->ld, result); ent;
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ent = ldap_next_message(li->ld, ent)) {
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- struct berval bv, *bvals, **bvp = &bvals;
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+ struct berval bv, *bvals;
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int binary = 0, msgtype;
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msgtype = ldap_msgtype(ent);
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@@ -481,9 +481,9 @@ static ssize_t ldap_recv(struct connectdata *conn, int sockindex, char *buf,
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Curl_client_write(conn, CLIENTWRITE_BODY, (char *)"\n", 1);
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data->req.bytecount += bv.bv_len + 5;
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- for(rc = ldap_get_attribute_ber(li->ld, ent, ber, &bv, bvp);
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- rc == LDAP_SUCCESS;
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- rc = ldap_get_attribute_ber(li->ld, ent, ber, &bv, bvp)) {
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+ for(rc = ldap_get_attribute_ber(li->ld, ent, ber, &bv, &bvals);
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+ (rc == LDAP_SUCCESS) && bvals;
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+ rc = ldap_get_attribute_ber(li->ld, ent, ber, &bv, &bvals)) {
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int i;
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if(bv.bv_val == NULL) break;
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--
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2.14.3
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