# CVE-2019-7249: Race condition in n/a

> A local attacker can exploit a race condition in the Keybase macOS Helper to tamper with other users' installations and escalate privileges.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 31 Jan 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-vr9v-36r3-5pfh

## What is CVE-2019-7249?

CVE-2019-7249 is a critical vulnerability in n/a, published on 31 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Keybase before 2.12.6 on macOS, the move RPC to the Helper was susceptible to time-to-check-time-to-use bugs and would also allow one user of the system (who didn't have root access) to tamper with another's installs.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2019-7249?

It affects 1 product.


Products: Keybase Keybase.

## How do I fix CVE-2019-7249?

No fix has been published for CVE-2019-7249 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-7249 being exploited?

There is no known exploitation of CVE-2019-7249 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-18629](https://insights.sbomify.com/CVE-2018-18629/): Privilege escalation in n/a (high 7.8)
- [CVE-2019-16992](https://insights.sbomify.com/CVE-2019-16992/): Other in n/a (high 7.5)
- [CVE-2021-34422](https://insights.sbomify.com/CVE-2021-34422/): Path traversal of file names in Keybase Client for Windows (high 7.2)
- [CVE-2021-23827](https://insights.sbomify.com/CVE-2021-23827/): Information disclosure in n/a (medium 5.5)
- [CVE-2021-34426](https://insights.sbomify.com/CVE-2021-34426/): Arbitrary command execution in Keybase Client for Windows (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-7249 and fix it if it is affected.

What it is: CVE-2019-7249 is a critical vulnerability in n/a, published on 31 Jan 2019. 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-2019-7249 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-2019-7249/ (Markdown: https://insights.sbomify.com/CVE-2019-7249/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-7249
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-7249
- OSV: https://osv.dev/vulnerability/CVE-2019-7249

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-7249/
Summaries are generated and may contain mistakes; the official description above is the record.