# CVE-1999-0248: Race condition in n/a

> A race condition in the SSH authentication agent allows attackers to steal user credentials, leading to account takeover.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Oct 2000
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-vhcr-j22h-735c

## What is CVE-1999-0248?

CVE-1999-0248 is a critical vulnerability in n/a, published on 13 Oct 2000. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A race condition in the authentication agent mechanism of sshd 1.2.17 allows an attacker to steal another user's credentials.

## Which versions are affected by CVE-1999-0248?

It affects 1 product.


Products: Ssh Ssh.

## How do I fix CVE-1999-0248?

No fix has been published for CVE-1999-0248 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-0248 being exploited?

There is no known exploitation of CVE-1999-0248 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-1999-0013](https://insights.sbomify.com/CVE-1999-0013/): Information disclosure in n/a (high 8.4)
- [CVE-2001-1473](https://insights.sbomify.com/CVE-2001-1473/): Weak cryptography in n/a (high 7.5)
- [CVE-2001-1475](https://insights.sbomify.com/CVE-2001-1475/): SSH before 2.0, when using RC4 and password authentication, allows remote attackers to replay messages until a new server key (VK) is generated. (high 7.5)
- [CVE-2001-1476](https://insights.sbomify.com/CVE-2001-1476/): SSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled, makes it easier for remote attackers to guess portions (high 7.5)
- [CVE-2001-0471](https://insights.sbomify.com/CVE-2001-0471/): Information disclosure in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-0248 and fix it if it is affected.

What it is: CVE-1999-0248 is a critical vulnerability in n/a, published on 13 Oct 2000. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-1999-0248 in the wild and no public exploit code.

Affected product: n/a. 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-1999-0248/ (Markdown: https://insights.sbomify.com/CVE-1999-0248/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-0248
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-0248
- OSV: https://osv.dev/vulnerability/CVE-1999-0248

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-0248/
Summaries are generated and may contain mistakes; the official description above is the record.