Bug 113099

Summary:	CAN-2003-0461 /proc reveals char count
Product:	Red Hat Enterprise Linux 3	Reporter:	Mark J. Cox <mjc>
Component:	kernel	Assignee:	Jeff Moyer <jmoyer>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	low
Version:	3.0	CC:	petrides, riel
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:	2004-05-12 01:08:15 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:
Bug Depends On:
Bug Blocks:	107562

Description Mark J. Cox 2004-01-08 15:25:43 UTC

CAN-2003-0461 /proc/tty/driver/serial in Linux 2.4.x reveals the exact
number of characters used in serial links, which could allow local
users to obtain potentially sensitive information such as the length
of passwords.

http://www.redhat.com/support/errata/RHSA-2003-238.html
http://rsbac.dyndns.org/pipermail/rsbac/2002-May/000162.html
http://developer.osdl.org/~chrisw/audit/2.4/proc_tty_serial.diff

This is a minor issue but should be addressed with some future
update.

Comment 1 Mark J. Cox 2004-01-08 15:26:24 UTC

(note not fixed in 2.4.21-7.EL)

Comment 3 Ernie Petrides 2004-02-11 05:54:14 UTC

A fix for this problem has just been committed to the RHEL3 U2
patch pool tonight.  It will first be available in kernel version
2.4.21-9.7.EL.

The /proc/tty/driver directory will now have permissions of 500
(i.e., root-only access).

Comment 4 John Flanagan 2004-05-12 01:08:15 UTC

An errata has been issued which should help the problem described in this bug report. 
This report is therefore being closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files, please follow the link below. You may reopen 
this bug report if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2004-188.html