# CVE-1999-1138: Misconfiguration in n/a

> Local attackers can access dos and asg accounts because their home directories are set to world-writable temporary folders.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Mar 2002
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-xjv5-hx29-64jx

## What is CVE-1999-1138?

CVE-1999-1138 is a critical vulnerability in Sco Openserver, published on 9 Mar 2002. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

## Which versions are affected by CVE-1999-1138?

It affects 4 products.


Products: Sco Open Desktop, Sco Open Desktop Lite, Sco Openserver, Sco Unix.

## How do I fix CVE-1999-1138?

No fix has been published for CVE-1999-1138 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-1138 being exploited?

There is no known exploitation of CVE-1999-1138 in the wild and no public exploit code.

## Other vulnerabilities in Sco Openserver

- [CVE-1999-1209](https://insights.sbomify.com/CVE-1999-1209/): Privilege escalation in n/a (high 7.2)
- [CVE-1999-1302](https://insights.sbomify.com/CVE-1999-1302/): Privilege escalation in n/a (high 7.2)
- [CVE-1999-1303](https://insights.sbomify.com/CVE-1999-1303/): Privilege escalation in n/a (high 7.2)
- [CVE-1999-1304](https://insights.sbomify.com/CVE-1999-1304/): Privilege escalation in n/a (high 7.2)
- [CVE-1999-1305](https://insights.sbomify.com/CVE-1999-1305/): Privilege escalation in n/a (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-1138 and fix it if it is affected.

What it is: CVE-1999-1138 is a critical vulnerability in Sco Openserver, published on 9 Mar 2002. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-1999-1138 in the wild and no public exploit code.

Affected product: Sco Openserver. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-1999-1138/ (Markdown: https://insights.sbomify.com/CVE-1999-1138/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-1138
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-1138
- OSV: https://osv.dev/vulnerability/CVE-1999-1138

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-1138/
Summaries are generated and may contain mistakes; the official description above is the record.