Bug 648666 (CVE-2010-4079)

Summary: CVE-2010-4079 kernel: drivers/video/ivtv/ivtvfb.c: reading uninitialized stack memory
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: 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 09:16:38 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: 648831, 648832, 648833    
Bug Blocks:    

Description Petr Matousek 2010-11-01 21:24:16 UTC
Description of problem:
The FBIOGET_VBLANK device ioctl in ivtvfb.c allows unprivileged users to read 16 bytes of uninitialized stack memory, because the 'reserved' member of the fb_vblank 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/2010/9/15/393


Acknowledgements:

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

Comment 2 Petr Matousek 2010-11-02 11:10:29 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 the Conexant's
CX23415/CX23416 codec chip.

Comment 3 Eugene Teo (Security Response) 2010-11-04 07:40:53 UTC
Upstream commit:
http://git.kernel.org/linus/405707985594169cfd0b1d97d29fcb4b4c6f2ac9

Comment 4 errata-xmlrpc 2010-12-08 19:10:03 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 19:46:32 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