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MagniComp SysInfo Information Exposure

MagniComp SysInfo Information Exposure
Posted May 18, 2018
Authored by Harry Sintonen

MagniComp SysInfo contains an information exposure vulnerability through debug functionality.

tags | advisory
advisories | CVE-2018-7268
SHA-256 | 879a6ff414ac55de6ca9ce6b7ca2e8ee7838c3d369cadf9baf7679892f4ab20e

MagniComp SysInfo Information Exposure

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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@magnicomp.com 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
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