# CVE-2020-13985: Memory corruption in n/a

> Memory corruption in Contiki's uIP stack allows attackers to execute code or cause denial of service via crafted IPv6 RPL headers.

- **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-7g47-vmvw-jcc2

## What is CVE-2020-13985?

CVE-2020-13985 is a high-severity memory corruption 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 Contiki through 3.0. A memory corruption vulnerability exists in the uIP TCP/IP stack component when handling RPL extension headers of IPv6 network packets in rpl_remove_header in net/rpl/rpl-ext-header.c.

Weakness: CWE-787 (Out-of-bounds Write), CWE-681 (Incorrect Conversion between Numeric Types), CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2020-13985?

It affects 1 product.


Products: Contiki-Os Contiki.

## How do I fix CVE-2020-13985?

No fix has been published for CVE-2020-13985 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13985 being exploited?

There is no known exploitation of CVE-2020-13985 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-40523](https://insights.sbomify.com/CVE-2021-40523/): Denial of service in n/a (high 7.5)
- [CVE-2021-38386](https://insights.sbomify.com/CVE-2021-38386/): Memory corruption in n/a (high 7.5)
- [CVE-2021-38387](https://insights.sbomify.com/CVE-2021-38387/): Denial of service in n/a (high 7.5)
- [CVE-2021-38311](https://insights.sbomify.com/CVE-2021-38311/): Denial of service in n/a (high 7.5)
- [CVE-2021-28362](https://insights.sbomify.com/CVE-2021-28362/): Integer overflow in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13985 and fix it if it is affected.

What it is: CVE-2020-13985 is a high-severity memory corruption 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-2020-13985 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-2020-13985/ (Markdown: https://insights.sbomify.com/CVE-2020-13985/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13985
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13985
- OSV: https://osv.dev/vulnerability/CVE-2020-13985

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13985/
Summaries are generated and may contain mistakes; the official description above is the record.