Bug 50335 - telnetd segfaults during session negotiation
Summary: telnetd segfaults during session negotiation
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: telnet   
(Show other bugs)
Version: 7.1
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Harald Hoyer
QA Contact: David Lawrence
Keywords: Security
: 10860 50476 (view as bug list)
Depends On:
TreeView+ depends on / blocked
Reported: 2001-07-30 15:49 UTC by Need Real Name
Modified: 2007-04-18 16:35 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2001-08-09 17:55:29 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2001:099 high SHIPPED_LIVE : New telnet packages available to fix buffer overflow vulnerabilities 2001-08-02 04:00:00 UTC

Description Need Real Name 2001-07-30 15:49:23 UTC
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 15:54:53 UTC

Comment 2 Harald Hoyer 2001-07-31 15:53:31 UTC
*** Bug 50476 has been marked as a duplicate of this bug. ***

Comment 3 Harald Hoyer 2001-08-01 06:42:11 UTC
*** Bug 10860 has been marked as a duplicate of this bug. ***

Comment 4 Harald Hoyer 2001-08-01 06:48:43 UTC
Could you please retry with:
Bonus: security fixes to the recently discovered vulnerabilities

Comment 5 Need Real Name 2001-08-01 07:32:40 UTC
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 07:36:06 UTC
date of errata depends on the QA team..

Comment 7 Pekka Savola 2001-08-01 11:43:01 UTC
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 17:55:25 UTC
Exploit for telnet-0.17 was just released...
Thanks for *not publishing* the advisory :-]

--rado b

Comment 9 Harald Hoyer 2001-08-22 10:14:01 UTC
Errata was published 

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