# CVE-2022-34899: Race condition in Access

> Local attackers can escalate privileges to root by exploiting a race condition in the Parallels Access Agent service via symbolic link abuse.

- **Severity:** High 7.0 (`CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 18 Jul 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-8qvg-9w3g-669p

## What is CVE-2022-34899?

CVE-2022-34899 is a high-severity vulnerability in Parallels Access, published on 18 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Access 6.5.4 (39316) Agent. An attacker must first obtain the ability to execute low-privileged code on the target host system in order to exploit this vulnerability. The specific flaw exists within the Parallels service. By creating a symbolic link, an attacker can abuse the service to execute a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-16134.

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

## Which versions are affected by CVE-2022-34899?

It affects 1 product.


Products: Parallels Parallels Access.

## How do I fix CVE-2022-34899?

No fix has been published for CVE-2022-34899 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-34899 being exploited?

There is no known exploitation of CVE-2022-34899 in the wild and no public exploit code.

## Other vulnerabilities in Parallels Access

- [CVE-2022-34900](https://insights.sbomify.com/CVE-2022-34900/): Privilege escalation in Access (high 7.8)
- [CVE-2022-34901](https://insights.sbomify.com/CVE-2022-34901/): Privilege escalation in Access (high 7.8)
- [CVE-2022-34902](https://insights.sbomify.com/CVE-2022-34902/): Privilege escalation in Access (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-34899 and fix it if it is affected.

What it is: CVE-2022-34899 is a high-severity vulnerability in Parallels Access, published on 18 Jul 2022. 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-2022-34899 in the wild and no public exploit code.

Affected product: Parallels Access. 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-2022-34899/ (Markdown: https://insights.sbomify.com/CVE-2022-34899/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-34899
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-34899
- OSV: https://osv.dev/vulnerability/CVE-2022-34899

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-34899/
Summaries are generated and may contain mistakes; the official description above is the record.