# CVE-2020-35710: Information disclosure in n/a

> Remote attackers can discover internal intranet IP addresses by submitting the login form, exposing internal network topology information.

- **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:** 25 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-35ch-vqm2-376r

## What is CVE-2020-35710?

CVE-2020-35710 is a medium-severity vulnerability in n/a, published on 25 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Parallels Remote Application Server (RAS) 18 allows remote attackers to discover an intranet IP address because submission of the login form (even with blank credentials) provides this address to the attacker's client for use as a "host" value. In other words, after an attacker's web browser sent a request to the login form, it would automatically send a second request to a RASHTML5Gateway/socket.io URI with something like "host":"192.168.###.###" in the POST data.

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

## Which versions are affected by CVE-2020-35710?

It affects 1 product.


Products: Parallels Remote Application Server.

## How do I fix CVE-2020-35710?

No fix has been published for CVE-2020-35710 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-35710 being exploited?

There is no known exploitation of CVE-2020-35710 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-45894](https://insights.sbomify.com/CVE-2023-45894/): Security feature bypass in n/a (critical 10.0)
- [CVE-2020-15860](https://insights.sbomify.com/CVE-2020-15860/): Business logic in n/a (critical 9.9)
- [CVE-2022-40870](https://insights.sbomify.com/CVE-2022-40870/): Command injection in n/a (high 8.1)
- [CVE-2017-9447](https://insights.sbomify.com/CVE-2017-9447/): Path traversal in n/a (high 7.5)
- [CVE-2020-8968](https://insights.sbomify.com/CVE-2020-8968/): Parallels Remote Application Server credentials management errors (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-35710 and fix it if it is affected.

What it is: CVE-2020-35710 is a medium-severity vulnerability in n/a, published on 25 Dec 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-2020-35710 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-2020-35710/ (Markdown: https://insights.sbomify.com/CVE-2020-35710/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-35710
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-35710
- OSV: https://osv.dev/vulnerability/CVE-2020-35710

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-35710/
Summaries are generated and may contain mistakes; the official description above is the record.