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Category:   Application (Generic)  >   Glibc Vendors:   GNU [multiple authors]
Glibc Heap Corruption in nss_files Backend Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1034196
SecurityTracker URL:  http://securitytracker.com/id/1034196
CVE Reference:   CVE-2015-5277   (Links to External Site)
Date:  Nov 20 2015
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Glibc. A local user can obtain elevated privileges on the target system.

A local user can exploit a flaw in the nss_files backend for the Name Service Switch to trigger a heap corruption error and execute arbitrary code on the target system with elevated privileges.

Sumit Bose and Lukas Slebodnik of Red Hat reported this vulnerability.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   The vendor has issued a source code fix [in June 2014], available at:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ac60763eac3d43b7234dd21286ad3ec3f17957fc

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.
Nov 20 2015 (Red Hat Issues Fix) Glibc Heap Corruption in nss_files Backend Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Nov 27 2015 (Oracle Issues Fix for Oracle Linux) Glibc Heap Corruption in nss_files Backend Lets Local Users Gain Elevated Privileges
Oracle has issued a fix for Oracle Linux 7.
Dec 10 2015 (Red Hat Issues Fix) Glibc Heap Corruption in nss_files Backend Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 7.1.
May 26 2016 (Ubuntu Issues Fix) Glibc Heap Corruption in nss_files Backend Lets Local Users Gain Elevated Privileges
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, and 15.10.



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