# CVE-2021-30357: Information disclosure in SSL Network Extender Client for Linux

> The SSL Network Extender Client for Linux reveals configuration file contents, allowing attackers to read files they should not access.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Jun 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-rh4f-mp79-c7jh

## What is CVE-2021-30357?

CVE-2021-30357 is a medium-severity vulnerability in SSL Network Extender Client for Linux, published on 8 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SSL Network Extender Client for Linux before build 800008302 reveals part of the contents of the configuration file supplied, which allows partially disclosing files to which the user did not have access.

Weakness: CWE-209 (Generation of Error Message Containing Sensitive Information)

## Which versions are affected by CVE-2021-30357?

It affects 1 product.


Products: Checkpoint Ssl Network Extender.

## How do I fix CVE-2021-30357?

No fix has been published for CVE-2021-30357 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-30357 being exploited?

There is no known exploitation of CVE-2021-30357 in the wild and no public exploit code.

Public exploit code:

- Proof-of-Concept for privileged file read through CheckPoint SNX VPN Linux Client  (github_poc): https://github.com/joaovarelas/CVE-2021-30357_CheckPoint_SNX_VPN_PoC

## Other vulnerabilities in SSL Network Extender Client for Linux

- [CVE-2022-23746](https://insights.sbomify.com/CVE-2022-23746/): Auth bypass in Gateway & Management, IPsec VPN blade SNX portal. (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-30357 and fix it if it is affected.

What it is: CVE-2021-30357 is a medium-severity vulnerability in SSL Network Extender Client for Linux, published on 8 Jun 2021. 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-2021-30357 in the wild and no public exploit code.

Affected product: SSL Network Extender Client for Linux. 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-2021-30357/ (Markdown: https://insights.sbomify.com/CVE-2021-30357/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-30357
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-30357
- OSV: https://osv.dev/vulnerability/CVE-2021-30357

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-30357/
Summaries are generated and may contain mistakes; the official description above is the record.