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From 9e244c9344a73af93cc79dd1176ce78971747027 Mon Sep 17 00:00:00 2001
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From: Mark Reynolds <mreynolds@redhat.com>
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Date: Tue, 3 Sep 2019 14:53:09 -0400
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Subject: [PATCH] CVE-2019-14824 (BZ#1748201) - deref plugin displays
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restricted attributes
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Bug Description: If there is an ACI that allows "search" access to an attribute,
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the deref plugin access control checks sees this is a "read"
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privilege and returns the attribute's value.
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Fix description: For deref plugin we are only concerned with "read" access, not
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"search" access. Removed the SLAPI_ACL_SEARCH right flag when
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checking access for an attribute.
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Reviewed by: lkrispen & tbordaz(Thanks!)
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---
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ldap/servers/plugins/deref/deref.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/ldap/servers/plugins/deref/deref.c b/ldap/servers/plugins/deref/deref.c
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index cb5ebb830..ec1884ba3 100644
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--- a/ldap/servers/plugins/deref/deref.c
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+++ b/ldap/servers/plugins/deref/deref.c
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@@ -573,7 +573,7 @@ deref_do_deref_attr(Slapi_PBlock *pb, BerElement *ctrlber, const char *derefdn,
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Slapi_Entry **entries = NULL;
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int rc;
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- /* If the access check on the attributes is done without retrieveing the entry
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+ /* If the access check on the attributes is done without retrieving the entry
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* it cannot handle acis which need teh entry, eg to apply a targetfilter rule
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* So the determination of attrs which can be dereferenced is delayed
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*/
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@@ -596,7 +596,7 @@ deref_do_deref_attr(Slapi_PBlock *pb, BerElement *ctrlber, const char *derefdn,
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int ii;
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int needattrvals = 1; /* need attrvals sequence? */
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if (deref_check_access(pb, entries[0], derefdn, attrs, &retattrs,
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- (SLAPI_ACL_SEARCH | SLAPI_ACL_READ))) {
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+ SLAPI_ACL_READ)) {
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slapi_log_err(SLAPI_LOG_PLUGIN, DEREF_PLUGIN_SUBSYSTEM,
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"deref_do_deref_attr - The client does not have permission to read the requested "
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"attributes in entry %s\n",
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@@ -714,7 +714,7 @@ deref_pre_entry(Slapi_PBlock *pb)
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attrs[1] = NULL;
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if (deref_check_access(pb, ent, NULL, attrs, &retattrs,
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- (SLAPI_ACL_SEARCH | SLAPI_ACL_READ))) {
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+ SLAPI_ACL_READ)) {
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slapi_log_err(SLAPI_LOG_PLUGIN, DEREF_PLUGIN_SUBSYSTEM,
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"deref_pre_entry - The client does not have permission to read attribute %s in entry %s\n",
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spec->derefattr, slapi_entry_get_dn_const(ent));
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--
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2.21.0
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