Bug 50335 - telnetd segfaults during session negotiation
telnetd segfaults during session negotiation
Product: Red Hat Linux
Classification: Retired
Component: telnet (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Harald Hoyer
David Lawrence
: Security
: 10860 50476 (view as bug list)
Depends On:
  Show dependency treegraph
Reported: 2001-07-30 11:49 EDT by Need Real Name
Modified: 2007-04-18 12:35 EDT (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2001-08-09 13:55:29 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Need Real Name 2001-07-30 11:49:23 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.2) Gecko/20010701

Description of problem:
telnetd crashes with SIG11 during telnet option negotiation. It may be
exploitable. I have tested telnet-server-0.17 release 7 and 10. I don't
have any RedHat 6.x boxes. See http://www.securityfocus.com/bid/3064

How reproducible:

Steps to Reproduce:
1. perl -e 'print "\xff\xf6"x2000' | nc localhost telnet

Actual Results:  telnetd recieves SIG11

Additional info:
Comment 1 Harald Hoyer 2001-07-30 11:54:53 EDT
Comment 2 Harald Hoyer 2001-07-31 11:53:31 EDT
*** Bug 50476 has been marked as a duplicate of this bug. ***
Comment 3 Harald Hoyer 2001-08-01 02:42:11 EDT
*** Bug 10860 has been marked as a duplicate of this bug. ***
Comment 4 Harald Hoyer 2001-08-01 02:48:43 EDT
Could you please retry with:
Bonus: security fixes to the recently discovered vulnerabilities

Comment 5 Need Real Name 2001-08-01 03:32:40 EDT
Seems that telnet-server-0.17-16.i386.rpm fixes the problem.
Thanks. When will be errata issued?

Comment 6 Harald Hoyer 2001-08-01 03:36:06 EDT
date of errata depends on the QA team..
Comment 7 Pekka Savola 2001-08-01 07:43:01 EDT
Mental note: it might be good idea to disable IPv6 patches for errata releases,
just in case.
Comment 8 Need Real Name 2001-08-09 13:55:25 EDT
Exploit for telnet-0.17 was just released...
Thanks for *not publishing* the advisory :-]

--rado b
Comment 9 Harald Hoyer 2001-08-22 06:14:01 EDT
Errata was published 

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