commit 71753cb7f7a16ff800381c0b5ee4e99eea92fed3
Author: Guido Günther <agx@sigxcpu.org>
Date:   Mon Mar 14 10:56:28 2011 +0800

    Add missing checks for read only connections
    
    As pointed on CVE-2011-1146, some API forgot to check the read-only
    status of the connection for entry point which modify the state
    of the system or may lead to a remote execution using user data.
    The entry points concerned are:
      - virConnectDomainXMLToNative
      - virNodeDeviceDettach
      - virNodeDeviceReAttach
      - virNodeDeviceReset
      - virDomainRevertToSnapshot
      - virDomainSnapshotDelete
    
    * src/libvirt.c: fix the above set of entry points to error on read-only
                     connections

Index: libvirt-0.8.8/src/libvirt.c
===================================================================
--- libvirt-0.8.8.orig/src/libvirt.c
+++ libvirt-0.8.8/src/libvirt.c
@@ -3152,6 +3152,10 @@ char *virConnectDomainXMLToNative(virCon
         virDispatchError(NULL);
         return NULL;
     }
+    if (conn->flags & VIR_CONNECT_RO) {
+        virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+        goto error;
+    }
 
     if (nativeFormat == NULL || domainXml == NULL) {
         virLibConnError(VIR_ERR_INVALID_ARG, __FUNCTION__);
@@ -9579,6 +9583,11 @@ virNodeDeviceDettach(virNodeDevicePtr de
         return -1;
     }
 
+    if (dev->conn->flags & VIR_CONNECT_RO) {
+        virLibConnError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+        goto error;
+    }
+
     if (dev->conn->driver->nodeDeviceDettach) {
         int ret;
         ret = dev->conn->driver->nodeDeviceDettach (dev);
@@ -9622,6 +9631,11 @@ virNodeDeviceReAttach(virNodeDevicePtr d
         return -1;
     }
 
+    if (dev->conn->flags & VIR_CONNECT_RO) {
+        virLibConnError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+        goto error;
+    }
+
     if (dev->conn->driver->nodeDeviceReAttach) {
         int ret;
         ret = dev->conn->driver->nodeDeviceReAttach (dev);
@@ -9667,6 +9681,11 @@ virNodeDeviceReset(virNodeDevicePtr dev)
         return -1;
     }
 
+    if (dev->conn->flags & VIR_CONNECT_RO) {
+        virLibConnError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+        goto error;
+    }
+
     if (dev->conn->driver->nodeDeviceReset) {
         int ret;
         ret = dev->conn->driver->nodeDeviceReset (dev);
@@ -12962,6 +12981,10 @@ virDomainRevertToSnapshot(virDomainSnaps
     }
 
     conn = snapshot->domain->conn;
+    if (conn->flags & VIR_CONNECT_RO) {
+        virLibConnError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+        goto error;
+    }
 
     if (conn->driver->domainRevertToSnapshot) {
         int ret = conn->driver->domainRevertToSnapshot(snapshot, flags);
@@ -13008,6 +13031,10 @@ virDomainSnapshotDelete(virDomainSnapsho
     }
 
     conn = snapshot->domain->conn;
+    if (conn->flags & VIR_CONNECT_RO) {
+        virLibConnError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+        goto error;
+    }
 
     if (conn->driver->domainSnapshotDelete) {
         int ret = conn->driver->domainSnapshotDelete(snapshot, flags);