# CVE-2021-30359: Privilege escalation in Check Point Harmony Browse and SandBlast Agent for Browsers

> Attackers can escalate privileges to admin by placing a malicious binary in the repair folder during installer repair, affecting Check Point browser agents.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/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:** 22 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-5r3w-7crg-r9gw

## What is CVE-2021-30359?

CVE-2021-30359 is a high-severity vulnerability in Check Point Harmony Browse and SandBlast Agent for Browsers, published on 22 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Harmony Browse and the SandBlast Agent for Browsers installers must have admin privileges to execute some steps during the installation. Because the MS Installer allows regular users to repair their installation, an attacker running an installer before 90.08.7405 can start the installation repair and place a specially crafted binary in the repair folder, which runs with the admin privileges.

Weakness: CWE-427 (Uncontrolled Search Path Element)

## Which versions are affected by CVE-2021-30359?

It affects 2 products.


Products: Checkpoint Harmony Browse, Checkpoint Sandblast Agent for Browsers.

## How do I fix CVE-2021-30359?

No fix has been published for CVE-2021-30359 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-30359 being exploited?

There is no known exploitation of CVE-2021-30359 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-30359 and fix it if it is affected.

What it is: CVE-2021-30359 is a high-severity vulnerability in Check Point Harmony Browse and SandBlast Agent for Browsers, published on 22 Oct 2021. 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-2021-30359 in the wild and no public exploit code.

Affected product: Check Point Harmony Browse and SandBlast Agent for Browsers. 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-2021-30359/ (Markdown: https://insights.sbomify.com/CVE-2021-30359/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-30359
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-30359
- OSV: https://osv.dev/vulnerability/CVE-2021-30359

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-30359/
Summaries are generated and may contain mistakes; the official description above is the record.