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- Fix CVE-2017-17740: when both the nops module and the memberof

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overlay are enabled, attempts to free a buffer that was allocated
  on the stack
  * patch: 0017-Fix-segfault-in-nops.patch
  (bsc#1073313)

OBS-URL: https://build.opensuse.org/package/show/network:ldap/openldap2?expand=0&rev=233
This commit is contained in:
Peter Varkoly 2018-11-21 15:17:38 +00:00 committed by Git OBS Bridge
parent 7fcf270ced
commit e604505058
3 changed files with 46 additions and 0 deletions
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35
0017-Fix-segfault-in-nops.patch Normal file
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@ -0,0 +1,35 @@
diff --git a/servers/slapd/overlays/memberof.c b/servers/slapd/overlays/memberof.c
index 54c24682a..06945d811 100644
--- a/servers/slapd/overlays/memberof.c
+++ b/servers/slapd/overlays/memberof.c
@@ -360,10 +360,16 @@ memberof_value_modify(
unsigned long opid = op->o_opid;
SlapReply rs2 = { REP_RESULT };
slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
- Modifications mod[ 2 ] = { { { 0 } } }, *ml;
- struct berval values[ 4 ], nvalues[ 4 ];
+ Modifications *mod, *ml;
+ struct berval *values, *nvalues;
int mcnt = 0;
+ mod = (Modifications*)malloc(2 * sizeof(Modifications));
+ memset(mod, 0, 2 * sizeof(Modifications));
+
+ values = (struct berval*)malloc(4 * sizeof(struct berval));
+ nvalues = (struct berval*)malloc(4 * sizeof(struct berval));
+
op2.o_tag = LDAP_REQ_MODIFY;
op2.o_req_dn = *ndn;
@@ -493,6 +499,11 @@ memberof_value_modify(
/* restore original opid */
op->o_opid = opid;
+
+ slap_mods_free( mod, 0 );
+ free(values);
+ free(nvalues);
+
/* FIXME: if old_group_ndn doesn't exist, both delete __and__
* add will fail; better split in two operations, although
* not optimal in terms of performance. At least it would

9
openldap2.changes
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@ -1,3 +1,12 @@
-------------------------------------------------------------------
Tue Nov 20 13:32:36 UTC 2018 - ckowalczyk@suse.com
- Fix CVE-2017-17740: when both the nops module and the memberof
overlay are enabled, attempts to free a buffer that was allocated
on the stack
* patch: 0017-Fix-segfault-in-nops.patch
(bsc#1073313)
-------------------------------------------------------------------
Mon Nov 12 14:25:52 UTC 2018 - Dominique Leuenberger <dleuenberger@suse.com>

2
openldap2.spec
View File

@ -69,6 +69,7 @@ Patch12: 0012-ITS8051-sockdnpat.patch
Patch14: 0014-ITS-8714-Send-out-EXTENDED-operation-message-from-back-sock.patch
Patch15: openldap-r-only.dif
Patch16: 0016-Clear-shared-key-only-in-close-function.patch
Patch17: 0017-Fix-segfault-in-nops.patch
Source200: %{name_ppolicy_check_module}-%{version_ppolicy_check_module}.tar.gz
Source201: %{name_ppolicy_check_module}.Makefile
Source202: %{name_ppolicy_check_module}.conf
@ -268,6 +269,7 @@ gzip -k %{S:203}
%patch14 -p1
%patch15 -p1
%patch16 -p1
%patch17 -p1
cp %{SOURCE5} .
# Move ppolicy check module and its Makefile into openldap-2.4/contrib/slapd-modules/