# CVE-2020-5132: Information disclosure in SMA100

> Attackers can exploit exposed internal domain names in SSL-VPN authentication pages to potentially bypass security controls or gain unauthorized 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:** 30 Sep 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-cm74-jg3x-hghv

## What is CVE-2020-5132?

CVE-2020-5132 is a medium-severity vulnerability in Sonicwall Sonicos, published on 30 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SonicWall SSL-VPN products and SonicWall firewall SSL-VPN feature misconfiguration leads to possible DNS flaw known as domain name collision vulnerability. When the users publicly display their organization’s internal domain names in the SSL-VPN authentication page, an attacker with knowledge of internal domain names can potentially take advantage of this vulnerability.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2020-5132?

It affects 2 products.


Products: Sonicwall Sma100 Firmware, Sonicwall Sonicos.

## How do I fix CVE-2020-5132?

No fix has been published for CVE-2020-5132 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5132 being exploited?

There is no known exploitation of CVE-2020-5132 in the wild and no public exploit code.

## Other vulnerabilities in Sonicwall Sonicos

- [CVE-2021-20017](https://insights.sbomify.com/CVE-2021-20017/): Command injection in SMA100 (high 8.8)
- [CVE-2021-20018](https://insights.sbomify.com/CVE-2021-20018/): Information disclosure in SMA100 (medium 4.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5132 and fix it if it is affected.

What it is: CVE-2020-5132 is a medium-severity vulnerability in Sonicwall Sonicos, published on 30 Sep 2020. 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-2020-5132 in the wild and no public exploit code.

Affected product: Sonicwall Sonicos. 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-2020-5132/ (Markdown: https://insights.sbomify.com/CVE-2020-5132/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5132
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5132
- OSV: https://osv.dev/vulnerability/CVE-2020-5132

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5132/
Summaries are generated and may contain mistakes; the official description above is the record.