MagniComp SysInfo Information Exposure [CVE-2018-7268]

[Harry Sintonen <bugtraq@xxxxxxxx>]

MagniComp SysInfo Information Exposure [CVE-2018-7268]
======================================================
The latest version of this advisory is available at:
https://sintonen.fi/advisories/magnicomp-sysinfo-information-exposure.txt


Overview
--------

MagniComp SysInfo contains a information exposure vulnerability through debug
functionality.


Description
-----------

Due to a combination of setuid binary and verbose debugging, MagniComp SysInfo 
can be
used to read any file on the system owned by root (uid 0).


Impact
------

A local unprivileged user is able to read any root (uid 0) owned file on the 
system,
regardless of the file permissions. Confidential information such as password 
hashes
(/etc/shadow) or other secrets (such as log files, private keys) can be leaked 
to
the attacker. The vulnerability has a confidentiality impact, but has no direct 
impact
on system integrity or availability.


Details
-------

[Full details of the vulnerability will be released on 2018.06.18.]


Vulnerabilities
---------------

[Full details of the vulnerability will be released on 2018.06.18.]


Vulnerable versions
-------------------

The following SysInfo versions are confirmed vulnerable:

- Linux/Unix/Mac SysInfo versions up and including 10.0 (H80)

Notably MagniComp SysInfo is bundled with the BMC BladeLogic Automation 
product. With
BMC BladeLogic installations the tool can be found from the following location:
/opt/bmc/bladelogic/RSCD/nativetool/bin


Mitigation
----------

1. Upgrade to SysInfo 10-H81 or later


Similar or prior work
---------------------

1. Unrelated earlier privilege escalation vulnerability CVE-2017-6516 -
   https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6516


Credits
-------

The vulnerability was discovered by Harry Sintonen / F-Secure Corporation.


Timeline
--------

2018.02.13  discovered the vulnerability
2018.02.14  wrote a preliminary advisory
2018.02.14  contacted MagniComp at info@xxxxxxxxxxxxx requesting security 
contact
2018.02.14  sent vulnerability details to CERT-FI vulncoord
2018.02.15  sent vulnerability details to MagniComp security contact
2018.02.16  MagniComp acknowledged the vulnerability
2018.02.20  requested CVE ID from MITRE
2018.02.21  CVE-2018-7268 assigned by MITRE
2018.02.22  MagniComp released SysInfo 10-H81 fixing the vulnerability. however,
            due to extensive OEM bundling the embargo is extended
2018.05.18  public disclosure of the redacted advisory