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Oracle Solaris 10 password hashes leaked through back-out patch files

Vulnerability Note VU#648244

Original Release Date: 2011-04-05 | Last Revised: 2011-04-05


Oracle Solaris 10 back-out patch files (undo.Z) contain password hashes which may be readable by unprivileged users.


The root password hash along with other users' password hashes may be contained in the back-out patch files. In some instances, these files may be readable by unprivileged users. An unprivileged user can extract the password hashes from the file and perform a brute force attack on the password hashes in an attempt to recover the password.


An attacker may be able to obtain the credentials for the root or other user accounts.


Apply an Update

Install patch 119254-80. Patch 119254-80 is also part of the April 1st recommended patch set for Solaris 10.

Restrict Access

System administrators should make sure the permissions for back-out patch files are not world-readable. These can typically be found at /var/sadm/pkg/<pkgname>/save/<patchid>/undo.Z.

Vendor Information


Oracle Corporation Affected

Updated:  January 24, 2011



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group Score Vector



Thanks to Michael Rutkowski of Duer Advanced Technology and Aerospace, Inc (DATA) for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

CVE IDs: CVE-2011-0412
Severity Metric: 0.54
Date Public: 2011-04-05
Date First Published: 2011-04-05
Date Last Updated: 2011-04-05 18:41 UTC
Document Revision: 24

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