Bug 648659 (CVE-2010-4074)

Summary:	CVE-2010-4074 kernel: drivers/usb/serial/mos*.c: reading uninitialized stack memory
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arozansk, bhu, fhrbata, jkacur, lgoncalv, peterm, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-19 09:16:09 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:	648696, 648697, 648698
Bug Blocks:

Description Petr Matousek 2010-11-01 21:17:36 UTC

Description of problem:
The TIOCGICOUNT device ioctl in both mos7720.c and mos7840.c allows unprivileged users to read uninitialized stack memory, because the "reserved" member of the serial_icounter_struct struct declared on the stack is not altered or zeroed before being copied back to the user.

Reference:
http://www.openwall.com/lists/oss-security/2010/10/06/6
http://lkml.org/lkml/2010/9/15/392

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.

Comment 2 Petr Matousek 2010-11-02 10:42:38 UTC

Statement:

This issue did not affect the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 3, 4, and 5 as they did not include support for Moschip USB
serial port adapters.

Comment 3 Eugene Teo (Security Response) 2010-11-04 07:54:00 UTC

Upstream commit:
http://git.kernel.org/linus/a0846f1868b11cd827bdfeaf4527d8b1b1c0b098

Comment 4 errata-xmlrpc 2010-12-08 19:09:54 UTC

This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2010:0958 https://rhn.redhat.com/errata/RHSA-2010-0958.html

Comment 5 errata-xmlrpc 2011-01-11 19:46:23 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0007 https://rhn.redhat.com/errata/RHSA-2011-0007.html