# CVE-2020-10575: Use after free in n/a

> A race condition in the Janus VideoCall plugin leads to use-after-free errors, potentially causing crashes or arbitrary code execution.

- **Severity:** Medium 4.2 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 14 Mar 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-10575, GHSA-75v9-3548-wg8c, UBUNTU-CVE-2020-10575

## What is CVE-2020-10575?

CVE-2020-10575 is a medium-severity use after free vulnerability in n/a, published on 14 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

An issue was discovered in Janus through 0.9.1. plugins/janus_videocall.c in the VideoCall plugin mishandles session management because a race condition causes some references to be freed too early or too many times.

Weakness: CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization)

## Which versions are affected by CVE-2020-10575?

It affects 1 product.


Products: Meetecho Janus.

## How do I fix CVE-2020-10575?

Upgrade to a fixed version.

## Is CVE-2020-10575 being exploited?

There is no known exploitation of CVE-2020-10575 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-14033](https://insights.sbomify.com/CVE-2020-14033/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-14034](https://insights.sbomify.com/CVE-2020-14034/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-13901](https://insights.sbomify.com/CVE-2020-13901/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-10574](https://insights.sbomify.com/CVE-2020-10574/): Null dereference in n/a (critical 9.8)
- [CVE-2021-4020](https://insights.sbomify.com/CVE-2021-4020/): Cross-site Scripting (XSS) - Stored in meetecho/janus-gateway (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-10575 and fix it if it is affected.

What it is: CVE-2020-10575 is a medium-severity use after free vulnerability in n/a, published on 14 Mar 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-10575 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-2020-10575/ (Markdown: https://insights.sbomify.com/CVE-2020-10575/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-10575
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-10575
- OSV: https://osv.dev/vulnerability/CVE-2020-10575

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-10575/
Summaries are generated and may contain mistakes; the official description above is the record.