---
id: CVE-1999-1138
title: >-
  SCO UNIX System V/386 Release 3.2, and other SCO products, installs the home
  directories (1) /tmp for the dos user, and (2) /usr/tmp for the asg user,
  which allows other users to gain access to those accounts since /tmp and
  /usr/tmp are …
summary: >-
  SCO UNIX System V/386 Release 3.2, and other SCO products, installs the home
  directories (1) /tmp for the dos user, and (2) /usr/tmp for the asg user,
  which allows other users to gain access to those accounts since /tmp and
  /usr/tmp are …
severity: critical
cvss: 10
cvssVector: 'AV:N/AC:L/Au:N/C:C/I:C/A:C'
published: '1993-09-17'
updated: '2026-06-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-1999-1138'
references:
  - url: 'http://www.cert.org/advisories/CA-1993-13.html'
    label: cve@mitre.org
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/546'
    label: cve@mitre.org
  - url: 'http://www.cert.org/advisories/CA-1993-13.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/546'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01564
epssPercentile: 0.7423
ingestedAt: '2026-06-19T03:39:00.720Z'
---

## Overview

SCO UNIX System V/386 Release 3.2, and other SCO products, installs the home directories (1) /tmp for the dos user, and (2) /usr/tmp for the asg user, which allows other users to gain access to those accounts since /tmp and /usr/tmp are world-writable.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.