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TUCoPS :: Cisco :: cisc5044.htm

Cisco - Bad telnetd on Cisco Catalyst switches allows DoS



30th Jan 2002 [SBWID-5044]
COMMAND

	Bad telnetd on Cisco Catalyst switches allows DoS

SYSTEMS AFFECTED

	 Catalyst 6000 series

	 Catalyst 5000 series

	 Catalyst 4000 series

	 Catalyst 2948G

	 Catalyst 2900

	

PROBLEM

	From   Cisco   advisory   regarding    Cisco    bug    ID    CSCdw19195,
	[http://www.cisco.com/warp/public/707/catos-telrcv-vuln-pub.shtml] :
	

	Some Cisco Catalyst  switches,  running  certain  CatOS  based  software
	releases, have a vulnerability wherein a buffer overflow in  the  telnet
	option handling can cause the telnet daemon to crash  and  result  in  a
	switch reload.

SOLUTION

	This vulnerability has been  fixed  in  the  following  switch  software
	revisions and the fix will be carried forward in all future releases.
	

	+-------------------------------------------------------------------------------+

	|               |   Release 4   |   Release 5   |   Release 6   |   Release 7   |

	|               |   code base   |   code base   |   code base   |   code base   |

	|---------------+---------------+---------------+---------------+---------------|

	| Catalyst 6000 |      Not      |  5.5(13) and  |  6.3(4) and   |  7.1(2) and   |

	| series        |  Applicable   |     later     |     later     |     later     |

	|---------------+---------------+---------------+---------------+---------------|

	| Catalyst 5000 |   4.5(13a)    |  5.5(13) and  |  6.3(4) and   |      Not      |

	| series        |               |     later     |     later     |  Applicable   |

	|---------------+---------------+---------------+---------------+---------------|

	| Catalyst 4000 | Not Available |  5.5(13) and  |  6.3(4) and   |  7.1(2) and   |

	| series        |               |     later     |     later     |     later     |

	+-------------------------------------------------------------------------------+

	


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