[SECURITY-891]

core/src/main/java/hudson/model/Queue.java

@@ -755,7 +755,9 @@ public boolean cancel(Item item) {
     public HttpResponse doCancelItem(@QueryParameter long id) throws IOException, ServletException {
         Item item = getItem(id);
         if (item != null) {
-            cancel(item);
+            if(item.hasCancelPermission()){
+                cancel(item);
+            }
         } // else too late, ignore (JENKINS-14813)
         return HttpResponses.forwardToPreviousPage();
     }
@@ -2193,7 +2195,9 @@ public String getSearchUrl() {
         @Deprecated
         @RequirePOST
         public HttpResponse doCancelQueue() throws IOException, ServletException {
-        	Jenkins.getInstance().getQueue().cancel(this);
+            if(hasCancelPermission()){
+                Jenkins.getInstance().getQueue().cancel(this);
+            }
             return HttpResponses.forwardToPreviousPage();
         }
 

test/src/test/java/hudson/model/QueueTest_SEC891.java

@@ -0,0 +1,84 @@
+package hudson.model;
+
+import com.gargoylesoftware.htmlunit.HttpMethod;
+import com.gargoylesoftware.htmlunit.Page;
+import com.gargoylesoftware.htmlunit.WebRequest;
+import hudson.model.Cause.UserIdCause;
+import hudson.slaves.NodeProvisionerRule;
+import jenkins.model.Jenkins;
+import org.junit.Rule;
+import org.junit.Test;
+import org.jvnet.hudson.test.JenkinsRule;
+import org.jvnet.hudson.test.MockAuthorizationStrategy;
+
+import java.net.URL;
+import java.util.function.Function;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.lessThan;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+//TODO merge into QueueTest after security patch
+public class QueueTest_SEC891 {
+
+    @Rule
+    public JenkinsRule r = new NodeProvisionerRule(-1, 0, 10);
+
+    @Test public void doCancelItem_PermissionIsChecked() throws Exception {
+        checkCancelOperationUsingUrl(item -> "queue/cancelItem?id=" + item.getId());
+    }
+
+    @Test public void doCancelQueue_PermissionIsChecked() throws Exception {
+        checkCancelOperationUsingUrl(item -> "queue/item/" + item.getId() + "/cancelQueue");
+    }
+
+    private void checkCancelOperationUsingUrl(Function<Queue.Item, String> urlProvider) throws Exception {
+        Queue q = r.jenkins.getQueue();
+
+        r.jenkins.setCrumbIssuer(null);
+        r.jenkins.setSecurityRealm(r.createDummySecurityRealm());
+        r.jenkins.setAuthorizationStrategy(new MockAuthorizationStrategy()
+                .grant(Jenkins.READ, Item.CANCEL).everywhere().to("admin")
+                .grant(Jenkins.READ).everywhere().to("user")
+        );
+
+        // prevent execution to push stuff into the queue
+        r.jenkins.setNumExecutors(0);
+        assertThat(q.getItems().length, equalTo(0));
+
+        FreeStyleProject testProject = r.createFreeStyleProject("test");
+        testProject.scheduleBuild(new UserIdCause());
+
+        Queue.Item[] items = q.getItems();
+        assertThat(items.length, equalTo(1));
+        Queue.Item currentOne = items[0];
+        assertFalse(currentOne.getFuture().isCancelled());
+
+        WebRequest request = new WebRequest(new URL(r.getURL() + urlProvider.apply(currentOne)), HttpMethod.POST);
+
+        { // user without right cannot cancel
+            JenkinsRule.WebClient wc = r.createWebClient();
+            wc.getOptions().setThrowExceptionOnFailingStatusCode(false);
+            wc.getOptions().setRedirectEnabled(false);
+            wc.login("user");
+            Page p = wc.getPage(request);
+            // currently the endpoint return a redirection to the previously visited page, none in our case 
+            // (so force no redirect to avoid false positive error)
+            assertThat(p.getWebResponse().getStatusCode(), lessThan(400));
+
+            assertFalse(currentOne.getFuture().isCancelled());
+        }
+        { // user with right can
+            JenkinsRule.WebClient wc = r.createWebClient();
+            wc.getOptions().setThrowExceptionOnFailingStatusCode(false);
+            wc.getOptions().setRedirectEnabled(false);
+            wc.login("admin");
+            Page p = wc.getPage(request);
+            assertThat(p.getWebResponse().getStatusCode(), lessThan(400));
+
+            assertTrue(currentOne.getFuture().isCancelled());
+        }
+    }
+}