Cisco IOS TFTP long file name buffer overflow
| cisco-tftp-filename-bo (9700) |  High Risk |
Description:
Multiple Cisco devices running Cisco Internetwork Operating System Software (IOS) are vulnerable to a denial of service attack, caused by a buffer overflow in the Trivial File Transfer Protocol (TFTP) server. Trivial File Transfer Protocol (TFTP) allows remote users to copy, transfer, or write to files without requiring authentication.By requesting a file name of 700 or more characters using the TFTP server, a remote attacker could overflow a buffer and cause the affected device to crash or reboot.
Note: On some affected versions of Cisco IOS, it may also be possible to exploit this vulnerability to execute code and gain control over the affected router.
Consequences:
Denial of Service
Remedy:
No remedy available as of July 9, 2011.
References:
- BugTraq Mailing List, Sat Jul 27 2002 - 13:19:03 CDT : Re: Phenoelit Advisory, 0815 ++ * - Cisco_tftp.
- Cisco Systems Inc. Security Advisory, 2002 July 30 18:00 GMT: TFTP Long Filename Vulnerability.
- Phenoelit Advisory
: Cisco_tftp.txt. - BID-5328: Cisco IOS TFTP Server Long File Name Buffer Overflow Vulnerability
- CVE-2002-0813: Heap-based buffer overflow in the TFTP server capability in Cisco IOS 11.1, 11.2, and 11.3 allows remote attackers to cause a denial of service (reset) or modify configuration via a long filename.
- OSVDB ID: 854: Cisco TFTP Server Long Filename DoS
Platforms Affected:
- Cisco IOS 11.1
- Cisco IOS 11.2
- Cisco IOS 11.3
Reported:
Jul 27, 2002
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