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Moderately critical

VMware ESXi Update Installer SFCB Authentication Security Bypass

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Release Date:  2010-12-22    Last Update:  2011-02-11    Views:  2,772

Secunia Advisory SA42591

Where:

From remote

Impact:

Security Bypass

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


A security issue has been reported in VMware ESXi, which can be exploited by malicious people to bypass certain security restrictions.

The security issue is caused due to the Update Installer incorrectly handling the SFCB authentication mode, which can lead to the SFCB authentication allowing arbitrary username and password combinations.

Successful exploitation requires that ESXi 4.1 was upgraded from ESXi 3.5 or 4.0, the SFCB configuration file (/etc/sfcb/sfcb.cfg) was modified prior to the upgrade, and that the sfcbd daemon is running (default).

The security issue is reported in version 4.1.


Solution:
Install the "ESXi 4.1 Installable Update 1", which contains the patch ESXi410-201101201-SG.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Reported by the vendor.

Original Advisory:
VMSA-2010-0020:
http://www.vmware.com/security/advisories/VMSA-2010-0020.html

VMware Knowledge Base Article #1031761:
http://kb.vmware.com/kb/1031761

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: VMware ESXi Update Installer SFCB Authentication Security Bypass

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