# CVE-2020-17442: Integer overflow in n/a

> An integer overflow in picoTCP's IPv6 extension header parsing allows remote attackers to cause a denial of service via crafted packets.

- **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:** 11 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-x2mc-h9jg-q83c

## What is CVE-2020-17442?

CVE-2020-17442 is a high-severity vulnerability in n/a, published on 11 Dec 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 picoTCP 1.7.0. The code for parsing the hop-by-hop IPv6 extension headers does not validate the bounds of the extension header length value, which may result in Integer Wraparound. Therefore, a crafted extension header length value may cause Denial-of-Service because it affects the loop in which the extension headers are parsed in pico_ipv6_process_hopbyhop() in pico_ipv6.c.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2020-17442?

It affects 1 product.


Products: Altran Picotcp.

## How do I fix CVE-2020-17442?

No fix has been published for CVE-2020-17442 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-17442 being exploited?

There is no known exploitation of CVE-2020-17442 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-33304](https://insights.sbomify.com/CVE-2021-33304/): Use after free in n/a (critical 9.8)
- [CVE-2020-24338](https://insights.sbomify.com/CVE-2020-24338/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-1000210](https://insights.sbomify.com/CVE-2017-1000210/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-17441](https://insights.sbomify.com/CVE-2020-17441/): Information disclosure in n/a (critical 9.1)
- [CVE-2020-24341](https://insights.sbomify.com/CVE-2020-24341/): Information disclosure in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-17442 and fix it if it is affected.

What it is: CVE-2020-17442 is a high-severity vulnerability in n/a, published on 11 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-2020-17442 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-2020-17442/ (Markdown: https://insights.sbomify.com/CVE-2020-17442/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-17442
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-17442
- OSV: https://osv.dev/vulnerability/CVE-2020-17442

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-17442/
Summaries are generated and may contain mistakes; the official description above is the record.