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Bug 10860

Summary:	Probable remote buffer overflow in telnetd < 0.16
Product:	[Retired] Red Hat Linux	Reporter:	Pekka Savola <pekkas>
Component:	telnet	Assignee:	Harald Hoyer <harald>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	high
Version:	6.1	CC:	sbnelson, valankar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2001-07-31 15:56:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Pekka Savola 2000-04-16 16:29:06 UTC

http://linuxtoday.com/stories/20245.html is Caldera Systems' security
advisory about telnetd buffer overflow that is causing grief in pre-0.16
netkit-based builds.  Massive buffer cleanup mentioned in netkit-telnet's
changelog would also hint at this.

Caldera seems to use same base files, so if we can assume the problem is
real there, it's most probably real in here too.  I checked the srpm files
you're using and there is no mention of this, nor patches.

Thus, I fear all builds up to 6.1 are affected.

Comment 1 Pekka Savola 2001-07-24 05:51:35 UTC

Escalating; this _must_ be fixed now:

Date: Wed, 18 Jul 2001 22:15:10 +0200
From: Sebastian <scut.de>
To: bugtraq
Subject: multiple vendor telnet daemon vulnerability

Systems Affected
===================

    System                                  | vulnerable   | exploitable *
    ----------------------------------------+--------------+------------------
    BSDI 4.x default                        |      yes     |       yes
    FreeBSD [2345].x default                |      yes     |       yes
    IRIX 6.5                                |      yes     |        no
    Linux netkit-telnetd < 0.14             |      yes     |        ?
    Linux netkit-telnetd >= 0.14            |       no     |
    NetBSD 1.x default                      |      yes     |       yes
    OpenBSD 2.x                             |      yes     |        ?
    OpenBSD current                         |       no     |
    Solaris 2.x sparc                       |      yes     |        ?
    <almost any other vendor's telnetd>     |      yes     |        ?
    ----------------------------------------+--------------+------------------

    * = From our analysis and conclusions, which may not be correct or we may
        have overseen things. Do not rely on this.

Comment 2 Harald Hoyer 2001-08-01 06:42:16 UTC


*** This bug has been marked as a duplicate of 50335 ***