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Bug 197610

Summary: CVE-2006-2936 Possible DoS in write routine of ftdi_sio driver
Product: Red Hat Enterprise Linux 4 Reporter: Marcel Holtmann <holtmann>
Component: kernelAssignee: Pete Zaitcev <zaitcev>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: low Docs Contact:
Priority: medium    
Version: 4.0CC: jbaron, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=low,source=vendorsec,reported=200600704,public=20060626
Fixed In Version: RHSA-2006-0617 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-08-22 18:49:58 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:
Attachments:
Description Flags
Candidate #1 - Abbreviated version for RHEL-4 none

Description Marcel Holtmann 2006-07-04 15:37:58 UTC 
Patch from Ian Abbott <abbotti.uk>

This patch limits the amount of outstanding 'write' data that can be queued up
for the ftdi_sio driver, to prevent userspace DoS attacks (or simple accidents)
that use up all the system memory by writing lots of data to the serial port.

http://www.kernel.org/git/?p=linux/kernel/git/gregkh/patches.git;a=blob;h=4b4d9cfea17618b80d3ac785b701faeaf60141f1;hb=396eb2aac550ec55856c6843ef9017e800c3d656;f=usb/usb-serial-ftdi_sio-prevent-userspace-dos.patch
Comment 1 Pete Zaitcev 2006-07-08 06:38:05 UTC 
Created attachment 132097 [details]
Candidate #1 - Abbreviated version for RHEL-4

I threw out the unrelated garbage from the receive path.
Comment 2 Jason Baron 2006-08-07 18:46:51 UTC 
committed in stream E5 build 42.0.1. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
Comment 5 Red Hat Bugzilla 2006-08-22 18:49:58 UTC 
An advisory 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-2006-0617.html
Comment 6 Jason Baron 2006-08-30 17:47:18 UTC 
committed in stream U5 build 42.4. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/