TFTP Server SP error message buffer overflow

tftpserversp-errormessage-bo (42298)

High Risk

Description:

TFTP Server SP is vulnerable to a stack-based and BSS-based buffer overflow, caused by improper bounds checking when handling error messages. By sending a specially-crafted TFTP error packet containing an overly long error message to UDP port 69, a remote attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges or cause the application to crash.

*CVSS:

Base Score:	10
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Complete
Integrity Impact:	Complete
Availability Impact:	Complete
Temporal Score:	9
Exploitability:	Functional
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Gain Access

Remedy:

No remedy available as of July 9, 2011.

References:

• SourceForge.net: TFTP Server.
• BID-29111: TFTP Server Error Packet Handling Remote Buffer Overflow Vulnerability
• CVE-2008-2161: Buffer overflow in TFTP Server SP 1.4 and 1.5 on Windows, and possibly other versions, allows remote attackers to execute arbitrary code via a long TFTP error packet. NOTE: some of these details are obtained from third party information.
• SA30147: TFTP Server SP Long Error Message Buffer Overflow
• VUPEN/ADV-2008-1468: TFTP Server SP Error Message Handling Buffer Overflow Vulnerability

Platforms Affected:

• TFTP Server TFTP Server 1.4
• TFTP Server TFTP Server 1.5

Reported:

May 08, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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