14 Aug, 2008
Veritas Storage Foundation for Windows Volume Manager Scheduler Service for Windows Security Update Circumvention

Revision History


Remote AccessYes, network access required
Local AccessNo
Authentication RequiredNo
Exploit publicly availableNo

It is possible to circumvent the security patch that resolved a previously identified authentication bypass, remote code execution vulnerability in the Veritas Storage Foundation for Windows v5.0 Volume Manager Scheduler Service. Successful exploitation could result in potential compromise of the targeted system.

Product(s) Affected
Veritas Storage Foundation for Windows5.0, 5.0 RP1a, 5.1

Note: Only those versions identified above are affected by this issue.

3Comís Zero Day Initiative, notified Symantec of a vector that can allow a malicious user to circumvent the security update for an authentication bypass vulnerability previously reported in the Veritas Storage Foundation for Windows Scheduler Service,

The Scheduler Service server, introduced in Veritas Storage Foundation for Windows v5.0, listens for incoming scheduling messages from client systems. An attacker with network access who could connect directly to the Scheduler Service socket could bypass the security update to the previously reported issue. By properly manipulating this vector, the attacker has the potential to add arbitrary commands to the registry that, if properly constructed, would be executed on the targeted system during normal scheduled runs.

Symantec Response
Symantec engineers have verified and resolved this issue in the Veritas Storage Foundation for Windows versions and builds identified above.

Symantec recommends customers apply the latest product update available for their supported product versions to enhance their security posture and protect against potential security threats of this nature.

Symantec knows of no exploitation of or adverse customer impact from this issue.

The patches listed above for affected product/version are available from the following location:

Best Practices
As part of normal best practices, Symantec strongly recommends:

Symantec would like to thank Tenable Security working through 3Com ZDI for reporting this issue and for providing coordination while Symantec resolved it.

SecurityFocus,, has assigned a Bugtraq ID (BID), 30596 to this issue for inclusion in the SecurityFocus vulnerability data base. The BID can be found at

This issue is a candidate for inclusion in the CVE list (, which standardizes names for security problems. A CVE Candidate name has be requested from the Common Vulnerabilities and Exposures (CVE) initiative for this issue. This advisory will be revised accordingly upon receipt of the CVE Candidate name.

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