Advisory Details

September 19th, 2016

AlienVault Unified Security Management Remote Authentication Bypass Vulnerability

ZDI-16-517
ZDI-CAN-3976

CVE ID
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS AlienVault
AFFECTED PRODUCTS Unified Security Management
VULNERABILITY DETAILS


This vulnerability allows remote attackers to bypass authentication requirements on vulnerable installations of AlienVault Unified Security Manager. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the logcheck function in session.inc. By providing a specific value as a user-agent, an attacker can bypass authentication to a number of pages. In addition to viewing information, it's possible to modify the application and achieve arbitrary code execution as root.

ADDITIONAL DETAILS AlienVault has issued an update to correct this vulnerability. More details can be found at:
https://www.alienvault.com/forums/discussion/7765/alienvault-v5-3-1-hotfix
DISCLOSURE TIMELINE
  • 2016-08-30 - Vulnerability reported to vendor
  • 2016-09-19 - Coordinated public release of advisory
CREDIT Peter Lapp (lappsec)
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