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Category:   Application (Generic)  >   Glibc Vendors:   GNU [multiple authors]
Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1038712
SecurityTracker URL:  http://securitytracker.com/id/1038712
CVE Reference:   CVE-2017-1000366   (Links to External Site)
Date:  Jun 20 2017
Impact:   Execution of arbitrary code via local system, Root access via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.25 and prior
Description:   A vulnerability was reported in Glibc. A local user can obtain elevated privileges on the target system.

A local user can supply specially crafted LD_LIBRARY_PATH values to trigger a stack memory allocation flaw in certain cases and execute arbitrary code on the target system with elevated privileges.

The stack guard-page memory gap can be "jumped" in cases where heap memory and stack memory are adjacent.

The original advisory is available at:

https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

Qualys Research Labs reported this vulnerability.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   The vendor has issued a source code fix, available at:

http://sourceware.org/git/?p=glibc.git;a=commit;h=f6110a8fee2ca36f8e2d2abecf3cba9fa7b8ea7d

Vendor URL:  www.gnu.org/software/libc/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jun 20 2017 (Red Hat Issues Fix) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Jun 20 2017 (Red Hat Issues Fix) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Jun 20 2017 (Oracle Issues Fix for Oracle Linux) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
Oracle has issued a fix for Oracle Linux 6 and 7.
Jun 20 2017 (Red Hat Issues Fix) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 5, 6.2, 6.4, 6.5, 6.6, 6.7, and 7.2.
Jun 20 2017 (CentOS Issues Fix) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
CentOS has issued a fix for CentOS 6 and 7.
Jun 21 2017 (Ubuntu Issues Fix) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS, 16.04 LTS, 16.10, and 17.04.
Aug 2 2017 (McAfee Issues Fix for McAfee Web Gateway) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
McAfee has issued a fix for McAfee Web Gateway.
Dec 5 2017 (IBM Issues Fix for IBM Security Guardium) Glibc Stack/Heap Memory Allocation Error Lets Local Users Gain Elevated Privileges
IBM has issued a fix for IBM Security Guardium.



 Source Message Contents



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