commit 8afa68bac0cf99d1f8aaa6566685c43c22622f26
Author: Ján Tomko <jtomko@redhat.com>
Date:   Fri Jun 14 09:16:14 2019 +0200

    api: disallow virConnectGetDomainCapabilities on read-only connections
    
    This API can be used to execute arbitrary emulators.
    Forbid it on read-only connections.
    
    Fixes: CVE-2019-10167
    Signed-off-by: Ján Tomko <jtomko@redhat.com>
    Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

Index: libvirt-5.4.0/src/libvirt-domain.c
===================================================================
--- libvirt-5.4.0.orig/src/libvirt-domain.c
+++ libvirt-5.4.0/src/libvirt-domain.c
@@ -11360,6 +11360,7 @@ virConnectGetDomainCapabilities(virConne
     virResetLastError();
 
     virCheckConnectReturn(conn, NULL);
+    virCheckReadOnlyGoto(conn->flags, error);
 
     if (conn->driver->connectGetDomainCapabilities) {
         char *ret;