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Symantec VERITAS NetBackup vnetd Buffer Overflow Vulnerability

TPTI-06-01: March 27th, 2006


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4021. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable Symantec VERITAS NetBackup client and server installations. Authentication is not required to exploit this vulnerability.

This specific flaw exists within specially crafted messages to the vnetd service, listening on TCP port 13724 via opcode 6 (Request Service). An attacker can overrun two fixed size buffers, one on the stack, and the other in the .data section of the executable.

In the main function of bpspsserver, a call to get_adaptable_string() at 0x0040243A reads in a variable length string from the network in the form of '[len][string]'. This string is then copied via a sprintf() at 0x00402458, and a swprintf() at 0x00402479 into two different fixed sized buffers. The first buffer is on the stack and the second buffer is a global variable.

Vendor Response

Symantec VERITAS has issued an update to correct this vulnerability. More details can be found at:

Symantec VERITAS states: Symantec engineers have addressed these issues in all currently supported versions of NetBackup. Symantec engineers did additional reviews and will continue on-going reviews of related file functionality to further enhance the overall security of Veritas NetBackup products and to eliminate any additional potential concerns. Security updates are available for all supported products. Symantec strongly recommends all customers immediately apply the latest cumulative Security Pack updates or Maintenance Pack releases as indicated for their supported product versions to protect against threats of this nature

Disclosure Timeline

    2006-01-23 - Vulnerability reported to vendor
    2006-03-27 - Coordinated public release of advisory


This vulnerability was discovered by:
    the TippingPoint Security Research Team