# CVE-2020-24388: Memory corruption in n/a

> An attacker can cause a denial of service by triggering an oversized memory copy in the YubiHSM shell tool due to missing length validation.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-rfxf-4r4p-5x86

## What is CVE-2020-24388?

CVE-2020-24388 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 19 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2. The function does not validate the embedded length field of a message received from the device. This could lead to an oversized memcpy() call that will crash the running process. This could be used by an attacker to cause a denial of service.

Weakness: CWE-787 (Out-of-bounds Write), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2020-24388?

It affects 2 products.


Products: Fedoraproject Fedora, Yubico Yubihsm-Shell.

## How do I fix CVE-2020-24388?

No fix has been published for CVE-2020-24388 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-24388 being exploited?

There is no known exploitation of CVE-2020-24388 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-24388 and fix it if it is affected.

What it is: CVE-2020-24388 is a high-severity memory corruption vulnerability in Fedoraproject Fedora, published on 19 Oct 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-2020-24388 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2020-24388/ (Markdown: https://insights.sbomify.com/CVE-2020-24388/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-24388
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-24388
- OSV: https://osv.dev/vulnerability/CVE-2020-24388

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-24388/
Summaries are generated and may contain mistakes; the official description above is the record.