Trustwave SpiderLabs Security Advisory TWSL2015-004:
"Probe" login access vulnerability in SAP ASE

Published: 04/23/2015
Version: 1.0

Vendor: SAP (www.sap.com)
Product: Adaptive Server Enterprise (ASE)
Version affected: 12.5, 15.0, 15.5, 15.7, 16.0

Product description:
Relational database management system for UNIX, Linux, and Microsoft Windows platforms.

Finding 1: SAP ASE "probe" login access vulnerability
Credit: Martin Rakhmanov of Trustwave 
CVE: CVE-2014-6284
CWE: CWE-287

SAP ASE ships with a login named "probe" used for the two-phase commit probe process, 
which uses a challenge and response mechanism to access Adaptive Server. There is a flaw in
implementation of the challenge and response mechanism that allows anyone to access the server
as "probe" login. While the "probe" is not a privileged account, other flaws exist that allow
privilege elevation from regular database user to database administrator. Combined with such privilege 
elevation vulnerabilities this one allows complete takeover of the database server.

The proof of concept is available at https://github.com/SpiderLabs/advisories-poc/blob/master/cve-2014-6284/probe.c

Remediation Steps:
Apply one of these following vendor supplied patches:
ASE 15.7 SP132
ASE 16.0 SP01

Revision History:
01/15/2014 - Vulnerability disclosed
04/22/2015 - SAP published security note 2113995
04/23/2015 - Advisory published

References
1. https://websmp230.sap-ag.de/sap/support/notes/2113995
2. https://github.com/SpiderLabs/advisories-poc/blob/master/cve-2014-6284/probe.c

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About Trustwave SpiderLabs:
SpiderLabs(R) is the advanced security team at Trustwave focused on
application security, incident response, penetration testing, physical
security and security research. The team has performed over a thousand
incident investigations, thousands of penetration tests and hundreds of
application security tests globally. In addition, the SpiderLabs Research
team provides intelligence through bleeding-edge research and proof of
concept tool development to enhance Trustwave's products and services.
https://www.trustwave.com/spiderlabs

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