Novell eDirectory Remote Code Execution

Notification Type: IBM Internet Security Systems Protection Advisory
Notification Date: December 1, 2009
Notification Version: 1.2
   
Name: Novell eDirectory Remote Code Execution
Public disclosure/
In the wild date:
November 23, 2009
Aliases: Novell Bug No. 524344 545887
CVE:

CVE-2009-0895

Description:

By sending a specially-crafted request, a remote attacker could exploit a vulnerability in Novell eDirectory to execute arbitrary code on the system.

Discoverer:

Chris Valasek and John McDonald of IBM X-Force

 

ISS Coverage

Product Content Version
Proventia Network IDS
Proventia Network IPS
Proventia Network MFS
Proventia Server (Linux)
RealSecure Network
RealSecure Server Sensor
29.060
Proventia Desktop
Proventia Server IPS (Windows)
2400
Propagation Techniques ISS Protection Available

remote exploit

 

Application_Control_Request_Overflow

09 JUN 2009

Detailed Description

Business Impact:

Compromise of networks and machines using affected versions of eDirectory may lead to exposure of confidential information, loss of productivity, and further network compromise. An attacker does not need to entice any kind of user interaction to trigger this vulnerability.  Successful exploitation would grant an attacker the privileges of the eDirectory service.

*CVSS Base Score: 10.0
  Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete
Adjusted Temporal Score: 7.4
  Exploitability: Unproven
Remediation Level: Official-Patch
Report Confidence: Confirmed
Affected Products: For a full list of affected versions, see references below.
Technical Description:

Novell eDirectory permits unauthenticated users to query the server for information about specific objects. The user can send a service request (NDS Verb 0x1) that has an integer used in memory allocation. A large integer can result in an integer wrap and a subsequent allocation returning an insufficient buffer, which results in a heap-based buffer overflow.

Remediation:

Patches are available for this issue. See References for details.

References

XFDB: http://xforce.iss.net/xforce/xfdb/50616
Novell: http://www.novell.com/support/viewContent.do?externalId=7004912&sliceId=1
FrequencyX: http://blogs.iss.net/archive/2009bhtalkexplained.html

Revision History

1.0 Initial publication.
1.1 Updated the publication date.
1.2
1.3
Added reference to FrequencyX blog post.
Corrected publication and disclosure dates.

* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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