diff -Nru firebird2.5-2.5.2~svn+54698.ds4/debian/changelog firebird2.5-2.5.2~svn+54698.ds4/debian/changelog
--- firebird2.5-2.5.2~svn+54698.ds4/debian/changelog	2012-06-30 19:26:39.000000000 +0700
+++ firebird2.5-2.5.2~svn+54698.ds4/debian/changelog	2013-02-05 12:08:05.000000000 +0700
@@ -1,3 +1,13 @@
+firebird2.5 (2.5.2~svn+54698.ds4-1ubuntu0.12.10.1) quantal-security; urgency=low
+
+  * SECURITY UPDATE: Fix for NULL pointer Denial of Service in TraceManager
+    (LP: #1115902)
+    - debian/patches/CVE-2012-5529.patch: Handle empty query safely. Based on
+      upstream patch.
+    - CVE-2012-5529
+
+ -- Christian Kuersteiner <ckuerste@gmx.ch>  Tue, 05 Feb 2013 11:51:04 +0700
+
 firebird2.5 (2.5.2~svn+54698.ds4-1) unstable; urgency=low
 
   * Snapshot from upstream's 2.5.2 tag, revision 54698. Still not the official
diff -Nru firebird2.5-2.5.2~svn+54698.ds4/debian/control firebird2.5-2.5.2~svn+54698.ds4/debian/control
--- firebird2.5-2.5.2~svn+54698.ds4/debian/control	2012-05-12 19:22:04.000000000 +0700
+++ firebird2.5-2.5.2~svn+54698.ds4/debian/control	2013-02-05 12:12:05.000000000 +0700
@@ -1,7 +1,8 @@
 Source: firebird2.5
 Section: database
 Priority: optional
-Maintainer: Debian Firebird Group <pkg-firebird-general@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian Firebird Group <pkg-firebird-general@lists.alioth.debian.org>
 Uploaders: Damyan Ivanov <dmn@debian.org>
 Build-Depends: 
  autoconf,
diff -Nru firebird2.5-2.5.2~svn+54698.ds4/debian/patches/CVE-2012-5529.patch firebird2.5-2.5.2~svn+54698.ds4/debian/patches/CVE-2012-5529.patch
--- firebird2.5-2.5.2~svn+54698.ds4/debian/patches/CVE-2012-5529.patch	1970-01-01 07:00:00.000000000 +0700
+++ firebird2.5-2.5.2~svn+54698.ds4/debian/patches/CVE-2012-5529.patch	2013-02-05 12:57:55.000000000 +0700
@@ -0,0 +1,16 @@
+Description: Server crashes on preparing empty query when trace is enabled
+Origin: upstream
+Author: ckuerste@gmx.ch
+Bug: http://tracker.firebirdsql.org/browse/CORE-3884
+Ubuntu-Bug: https://bugs.launchpad.net/ubuntu/+source/firebird2.5/+bug/1115902
+--- a/src/jrd/trace/TraceDSQLHelpers.h
++++ b/src/jrd/trace/TraceDSQLHelpers.h
+@@ -88,7 +88,7 @@
+ 			Firebird::string str(*getDefaultMemoryPool(), m_string, m_string_len);
+ 
+ 			TraceFailedSQLStatement stmt(str);
+-			TraceManager::event_dsql_prepare(m_attachment, m_request->req_transaction,
++                       TraceManager::event_dsql_prepare(m_attachment, m_request ? m_request->req_transaction:NULL,
+ 				&stmt, millis, result);
+ 		}
+ 	}
diff -Nru firebird2.5-2.5.2~svn+54698.ds4/debian/patches/series firebird2.5-2.5.2~svn+54698.ds4/debian/patches/series
--- firebird2.5-2.5.2~svn+54698.ds4/debian/patches/series	2012-03-27 19:09:28.000000000 +0700
+++ firebird2.5-2.5.2~svn+54698.ds4/debian/patches/series	2013-02-05 11:39:00.000000000 +0700
@@ -10,3 +10,4 @@
 parallel-build.patch
 versioned-log-filename.patch
 link_atomic_ops.patch
+CVE-2012-5529.patch