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Category:   Application (Generic)  >   VMware Vendors:   VMware
(VMware Issues Fix) Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges
SecurityTracker Alert ID:  1009635
SecurityTracker URL:  http://securitytracker.com/id/1009635
CVE Reference:   CVE-2004-0077   (Links to External Site)
Date:  Apr 2 2004
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): ESX Server 1.5.2, 2.0, and 2.0.1
Description:   Another vulnerability was reported in the Linux kernel do_mremap() function. A local user can execute arbitrary code with root privileges.

Paul Starzetz discovered and reported that there is a missing return value check within the mremap(2) system call.

When resizing or moving virtual memory areas, the function reportedly does not test the return value of the do_munmap() function. Cases where the function fails (for example, due to the number of virtual memory areas being exceeded by the calling process) will not be properly detected, according to the report. As a result, the kernel may move memory belonging to one process into memory space that is allocated to another process.

Some other calls to the do_munmap() function are also not checked, the report said.

A local user can gain root privileges on the target system.

The original advisory is available at:

http://isec.pl/vulnerabilities/isec-0014-mremap-unmap.txt

Impact:   A local user can gain root privileges on the target system.
Solution:   VMware issued a security update for ESX Server 1.5.2, 2.0, and 2.0.1.

For ESX Server 2.0.1:

http://www.vmware.com/download/esx/esx201-7427update.html

For ESX Server 2:

http://www.vmware.com/download/esx/esx20-7483update.html

For ESX Server 1.5.2 patch 5:

http://www.vmware.com/download/esx/esx152-7428update.html

Cause:   Boundary error

Message History:   This archive entry is a follow-up to the message listed below.
Feb 18 2004 Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges



 Source Message Contents

Subject:  VMware security update


VMware issued a security update for ESX Server 1.5.2, 2.0, and 2.0.1 regarding CVE entries 
CAN-2004-0077, CAN-2003-0961, and CAN-2003-0985.

For ESX Server 2.0.1:

http://www.vmware.com/download/esx/esx201-7427update.html

For ESX Server 2:

http://www.vmware.com/download/esx/esx20-7483update.html

For ESX Server 1.5.2 patch 5:

http://www.vmware.com/download/esx/esx152-7428update.html

 
 


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