Netscape vulnerable to arbitrary file overwriting via symlink redirection of temporary file

2001-11-15T00:00:00
ID VU:356323
Type cert
Reporter CERT
Modified 2001-11-15T00:00:00

Description

Overview

During installation, Netscape 6.0.1 creates a temporary file with insecure options and a predictable name in a world-writable location. By using a symbolic link attack, an attacker could cause overwrite of arbitrary files.

Description

The installation script for Netscape 6.0.1 creates a temporary file with a predictable name in /tmp, a world-writable directory. This file is not checked for prior existence or ownership.


Impact

If the installation is done while the system is in multi-user mode, an attacker may be able to create a symbolic link with appropriate name and cause overwrite of any writable file on the system.


Solution

The CERT/CC is currently unaware of a practical solution to this problem.


Perform the install in single-user mode.


Systems Affected

Vendor| Status| Date Notified| Date Updated
---|---|---|---
Netscape| | 09 Oct 2001| 15 Nov 2001
If you are a vendor and your product is affected, let us know.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | N/A | N/A

References

  • <http://www.securityfocus.com/bid/3243>

Credit

This vulnerability was first described by Larry W. Cashdollar.

This document was last modified by Tim Shimeall.

Other Information

  • CVE IDs: Unknown
  • Date Public: 28 Aug 2001
  • Date First Published: 15 Nov 2001
  • Date Last Updated: 15 Nov 2001
  • Severity Metric: 1.58
  • Document Revision: 8