J-Security Center

Latest Attack Object Updates
  • IDP Daily Update #1537
    posted: 11/06/09
  • NSM Daily Update #1537
    posted: 11/06/09
  • Deep Inspection 5.3r5 and above, 5.4, 6.0 #1537
    posted: 11/06/09
  • Deep Inspection 5.1 and 5.2 #1435
    posted: 11/06/09
  • Deep Inspection 5.0, 5.3r4 and below #1132
    posted: 03/28/08 (04/01/08 for 5.0)
  • Antivirus
    posted: 11/05/09

Title: IBM DB2 JDBC Applet Server Buffer Overflow Vulnerability

Severity: CRITICAL

Description:

A remotely exploitable buffer overflow exists in IBM DB2 JDBC Applet Server. This issue is due to insufficient bounds checking of data included in requests that are passed to the JDBC service.

It is reported that clients can connect to the JDBC Applet Server over TCP port 6789. The connection packet includes the clients' authenticaion credentials including a username and password, the db2java.zip version, and the name of the database the clients are attempting to connect to.

The vulnerability can be exploited by connecting to a vulnerable server with a connection packet containing a username of 2200 bytes or more then disconnecting. The attacker must then reconnect to the server and provide a shorter username but specify the db2java.zip version to an unexpected value such as 544 unicode bytes of \x00\x41. Reportedly, the application generates an error, removes the null terminator, and concatenates the original malformed username to the db2java.zip version. This is copied to a static buffer, resulting in an overflow condition.

A successful attack can cause memory regions adjacent to the destination buffer to be overrun with the superfluous data. This will result in memory corruption that could be leveraged to control execution flow of the program.

Successful exploitation may allow execution of arbitrary code with the privilege of the db2jd service.

This is likely one of the issues announced in BIDs 11089 and 11327. It is now being assigned its own BID since the vendor has provided additional technical information.

Affected Products:

  • IBM DB2 Universal Database for AIX 7.0.0
  • IBM DB2 Universal Database for AIX 7.1.0
  • IBM DB2 Universal Database for AIX 7.2.0
  • IBM DB2 Universal Database for AIX 8.0.0
  • IBM DB2 Universal Database for AIX 8.1.0
  • IBM DB2 Universal Database for HP-UX 7.0.0
  • IBM DB2 Universal Database for HP-UX 7.1.0
  • IBM DB2 Universal Database for HP-UX 7.2.0
  • IBM DB2 Universal Database for HP-UX 8.0.0
  • IBM DB2 Universal Database for HP-UX 8.1.0
  • IBM DB2 Universal Database for Linux 7.0.0
  • IBM DB2 Universal Database for Linux 7.1.0
  • IBM DB2 Universal Database for Linux 7.2.0
  • IBM DB2 Universal Database for Linux 8.0.0
  • IBM DB2 Universal Database for Linux 8.1.0
  • IBM DB2 Universal Database for Solaris 7.0.0
  • IBM DB2 Universal Database for Solaris 7.1.0
  • IBM DB2 Universal Database for Solaris 7.2.0
  • IBM DB2 Universal Database for Solaris 8.0.0
  • IBM DB2 Universal Database for Solaris 8.1.0
  • IBM DB2 Universal Database for Windows 7.1.0
  • IBM DB2 Universal Database for Windows 7.2.0
  • IBM DB2 Universal Database for Windows 8.0.0
  • IBM DB2 Universal Database for Windows 8.1.0

References:

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