# CVE-2020-17443: Integer overflow in n/a

> An integer overflow in picoTCP's ICMPv6 echo reply handling allows remote attackers to cause a denial of service via malformed 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-gj9f-3v8v-xvvr

## What is CVE-2020-17443?

CVE-2020-17443 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 creating an ICMPv6 echo replies doesn't check whether the ICMPv6 echo request packet's size is shorter than 8 bytes. If the size of the incoming ICMPv6 request packet is shorter than this, the operation that calculates the size of the ICMPv6 echo replies has an integer wrap around, leading to memory corruption and, eventually, Denial-of-Service in pico_icmp6_send_echoreply_not_frag in pico_icmp6.c.

Weakness: CWE-787 (Out-of-bounds Write), CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2020-17443?

It affects 1 product.


Products: Altran Picotcp.

## How do I fix CVE-2020-17443?

No fix has been published for CVE-2020-17443 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-17443 being exploited?

There is no known exploitation of CVE-2020-17443 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-2020-17443 and fix it if it is affected.

What it is: CVE-2020-17443 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-2020-17443 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-2020-17443/ (Markdown: https://insights.sbomify.com/CVE-2020-17443/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-17443
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-17443
- OSV: https://osv.dev/vulnerability/CVE-2020-17443

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-17443/
Summaries are generated and may contain mistakes; the official description above is the record.