VMSA-2010-0020 : VMware ESXi 4.1 Update Installer SFCB Authentication Flaw
High Nessus Plugin ID 99166
SynopsisThe remote VMware ESXi host is missing a security-related patch.
Descriptiona. ESXi 4.1 Update Installer SFCB Authentication Flaw
Under certain conditions, the ESXi 4.1 installer that upgrades an ESXi 3.5 or ESXi 4.0 host to ESXi 4.1 incorrectly handles the SFCB authentication mode. The result is that SFCB authentication could allow login with any username and password combination.
An ESXi 4.1 host is affected if all of the following apply :
- ESXi 4.1 was upgraded from ESXi 3.5 or ESXi 4.0.
- The SFCB configuration file /etc/sfcb/sfcb.cfg was modified prior to the upgrade.
- The sfcbd daemon is running (sfcbd runs by default).
Workaround A workaround that can be applied to ESXi 4.1 is described in VMware Knowledge Base Article KB 1031761
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2010-4573 to this issue.
SolutionApply the missing patch.