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From 4df47543690a8b185d04ca6a0270e231e4491e6d Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek@redhat.com>
Date: Mon, 16 Mar 2015 11:12:25 +0100
Subject: [PATCH 47/99] IPA: Only treat malformed HBAC rules as fatal if deny
rules are enabled
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
https://fedorahosted.org/sssd/ticket/2603
If deny rules are not in effect, we can skip malformed HBAC rules
because at worst we will deny access. If deny rules are in effect, we
need to error out to be on the safe side and avoid skipping a deny rule.
Reviewed-by: Pavel Březina <pbrezina@redhat.com>
(cherry picked from commit c41ae115bfa808d04e729dcbd759d8aae8387ce7)
---
src/providers/ipa/ipa_hbac_common.c | 68 +++++++++++++++++++++++++++++--------
1 file changed, 54 insertions(+), 14 deletions(-)
diff --git a/src/providers/ipa/ipa_hbac_common.c b/src/providers/ipa/ipa_hbac_common.c
index 8436b7e2d1e9b745e3265c319669cf196f610ee1..a7e338e995de0f2e4142132c056476bc301d80cc 100644
--- a/src/providers/ipa/ipa_hbac_common.c
+++ b/src/providers/ipa/ipa_hbac_common.c
@@ -403,18 +403,21 @@ static errno_t
hbac_eval_user_element(TALLOC_CTX *mem_ctx,
struct sss_domain_info *domain,
const char *username,
+ bool deny_rules,
struct hbac_request_element **user_element);
static errno_t
hbac_eval_service_element(TALLOC_CTX *mem_ctx,
struct sss_domain_info *domain,
const char *servicename,
+ bool deny_rules,
struct hbac_request_element **svc_element);
static errno_t
hbac_eval_host_element(TALLOC_CTX *mem_ctx,
struct sss_domain_info *domain,
const char *hostname,
+ bool deny_rules,
struct hbac_request_element **host_element);
static errno_t
@@ -452,17 +455,20 @@ hbac_ctx_to_eval_request(TALLOC_CTX *mem_ctx,
ret = ENOMEM;
goto done;
}
- ret = hbac_eval_user_element(eval_req, user_dom,
- pd->user, &eval_req->user);
+ ret = hbac_eval_user_element(eval_req, user_dom, pd->user,
+ hbac_ctx->get_deny_rules,
+ &eval_req->user);
} else {
- ret = hbac_eval_user_element(eval_req, domain,
- pd->user, &eval_req->user);
+ ret = hbac_eval_user_element(eval_req, domain, pd->user,
+ hbac_ctx->get_deny_rules,
+ &eval_req->user);
}
if (ret != EOK) goto done;
/* Get the PAM service and service groups */
- ret = hbac_eval_service_element(eval_req, domain,
- pd->service, &eval_req->service);
+ ret = hbac_eval_service_element(eval_req, domain, pd->service,
+ hbac_ctx->get_deny_rules,
+ &eval_req->service);
if (ret != EOK) goto done;
/* Get the source host */
@@ -477,8 +483,9 @@ hbac_ctx_to_eval_request(TALLOC_CTX *mem_ctx,
rhost = pd->rhost;
}
- ret = hbac_eval_host_element(eval_req, domain,
- rhost, &eval_req->srchost);
+ ret = hbac_eval_host_element(eval_req, domain, rhost,
+ hbac_ctx->get_deny_rules,
+ &eval_req->srchost);
if (ret != EOK) goto done;
/* The target host is always the current machine */
@@ -490,8 +497,9 @@ hbac_ctx_to_eval_request(TALLOC_CTX *mem_ctx,
goto done;
}
- ret = hbac_eval_host_element(eval_req, domain,
- thost, &eval_req->targethost);
+ ret = hbac_eval_host_element(eval_req, domain, thost,
+ hbac_ctx->get_deny_rules,
+ &eval_req->targethost);
if (ret != EOK) goto done;
*request = talloc_steal(mem_ctx, eval_req);
@@ -507,6 +515,7 @@ static errno_t
hbac_eval_user_element(TALLOC_CTX *mem_ctx,
struct sss_domain_info *domain,
const char *username,
+ bool deny_rules,
struct hbac_request_element **user_element)
{
errno_t ret;
@@ -564,8 +573,15 @@ hbac_eval_user_element(TALLOC_CTX *mem_ctx,
ret = get_ipa_groupname(users->groups, domain->sysdb, member_dn,
&users->groups[num_groups]);
if (ret != EOK && ret != ERR_UNEXPECTED_ENTRY_TYPE) {
- DEBUG(SSSDBG_MINOR_FAILURE, "Parse error on [%s]\n", member_dn);
- goto done;
+ if (deny_rules) {
+ DEBUG(SSSDBG_OP_FAILURE, "Parse error on [%s]: %s\n",
+ member_dn, sss_strerror(ret));
+ goto done;
+ } else {
+ DEBUG(SSSDBG_MINOR_FAILURE,
+ "Skipping malformed entry [%s]\n", member_dn);
+ continue;
+ }
} else if (ret == EOK) {
DEBUG(SSSDBG_TRACE_LIBS, "Added group [%s] for user [%s]\n",
users->groups[num_groups], users->name);
@@ -601,6 +617,7 @@ static errno_t
hbac_eval_service_element(TALLOC_CTX *mem_ctx,
struct sss_domain_info *domain,
const char *servicename,
+ bool deny_rules,
struct hbac_request_element **svc_element)
{
errno_t ret;
@@ -671,7 +688,18 @@ hbac_eval_service_element(TALLOC_CTX *mem_ctx,
ret = get_ipa_servicegroupname(tmp_ctx, domain->sysdb,
(const char *)el->values[i].data,
&name);
- if (ret != EOK && ret != ERR_UNEXPECTED_ENTRY_TYPE) goto done;
+ if (ret != EOK && ret != ERR_UNEXPECTED_ENTRY_TYPE) {
+ if (deny_rules) {
+ DEBUG(SSSDBG_OP_FAILURE, "Parse error on [%s]: %s\n",
+ (const char *)el->values[i].data,
+ sss_strerror(ret));
+ goto done;
+ } else {
+ DEBUG(SSSDBG_MINOR_FAILURE, "Skipping malformed entry [%s]\n",
+ (const char *)el->values[i].data);
+ continue;
+ }
+ }
/* ERR_UNEXPECTED_ENTRY_TYPE means we had a memberOf entry that wasn't a
* service group. We'll just ignore those (could be
@@ -699,6 +727,7 @@ static errno_t
hbac_eval_host_element(TALLOC_CTX *mem_ctx,
struct sss_domain_info *domain,
const char *hostname,
+ bool deny_rules,
struct hbac_request_element **host_element)
{
errno_t ret;
@@ -777,7 +806,18 @@ hbac_eval_host_element(TALLOC_CTX *mem_ctx,
ret = get_ipa_hostgroupname(tmp_ctx, domain->sysdb,
(const char *)el->values[i].data,
&name);
- if (ret != EOK && ret != ERR_UNEXPECTED_ENTRY_TYPE) goto done;
+ if (ret != EOK && ret != ERR_UNEXPECTED_ENTRY_TYPE) {
+ if (deny_rules) {
+ DEBUG(SSSDBG_OP_FAILURE, "Parse error on [%s]: %s\n",
+ (const char *)el->values[i].data,
+ sss_strerror(ret));
+ goto done;
+ } else {
+ DEBUG(SSSDBG_MINOR_FAILURE, "Skipping malformed entry [%s]\n",
+ (const char *)el->values[i].data);
+ continue;
+ }
+ }
/* ERR_UNEXPECTED_ENTRY_TYPE means we had a memberOf entry that wasn't a
* host group. We'll just ignore those (could be
--
2.4.0
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