---------------------------------------------------------------------- SNS Advisory No.88 Webmin Directory Traversal Vulnerability Problem first discovered on: Sun, 04 Jun 2006 Published on: Fri, 23 Jun 2006 ---------------------------------------------------------------------- Severity Level: --------------- Medium Overview: --------- Webmin for Windows contains directory traversal vulnerability that allows remote attackers to download arbitrary files without authentication. Problem Description: -------------------- Webmin is a web-based system administration tool for Unix, MacOS X and Windows platform. Webmin 1.270 and earlier versions does not properly handle "" (backslash). On Windows platform, this allows attackers to access outside of the public directory and files. In default configurations of Webmin, it is required authentication to access almost directories under top page. But there are some directories where is not required authentication to access. For example, the directory which stores the image used before login. Therefore, by exploiting directory traversal vulnerability from these directories, the vulnerability allows remote attackers to download the contents of arbitrary files without authentication. Affected Versions: ------------------ Webmin (on Windows) Version 1.270 and earlier versions Solution: --------- This problem can be addressed by upgrading Webmin to 1.280 or later. http://www.webmin.com/ Discovered by: -------------- Keigo Yamazaki (LAC) Thanks to: ---------- This SNS Advisory is being published in coordination with Information-technology Promotion Agency, Japan (IPA) and JPCERT/CC. http://jvn.jp/jp/JVN%2367974490/index.html http://www.ipa.go.jp/security/vuln/documents/2006/JVN_67974490_webmin.ht ml Disclaimer: ----------- The information contained in this advisory may be revised without prior notice and is provided as it is. Users shall take their own risk when taking any actions following reading this advisory. LAC Co., Ltd. shall take no responsibility for any problems, loss or damage caused by, or by the use of information provided here. This advisory can be found at the following URL: http://www.lac.co.jp/business/sns/intelligence/SNSadvisory_e/88_e.html ----------------------------------------------------------------------