# CVE-2020-13143: Information disclosure in n/a

> Attackers can trigger an out-of-bounds read in the Linux kernel USB gadget driver by exploiting a null byte handling flaw, potentially disclosing sensitive memory.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 18 May 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-13143, GHSA-q5ch-c53x-9gxj, UBUNTU-CVE-2020-13143

## What is CVE-2020-13143?

CVE-2020-13143 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 18 May 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

gadget_dev_desc_UDC_store in drivers/usb/gadget/configfs.c in the Linux kernel 3.16 through 5.6.13 relies on kstrdup without considering the possibility of an internal '\0' value, which allows attackers to trigger an out-of-bounds read, aka CID-15753588bcd4.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2020-13143?

It affects 24 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp A700s Firmware, Netapp Active Iq Unified Manager, Netapp Bootstrap Os, Netapp Cloud Backup, Netapp Element Software, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware, Netapp H500e Firmware, Netapp H500s Firmware, Netapp H610c Firmware, Netapp H610s Firmware, Netapp H615c Firmware, Netapp H700e Firmware, Netapp H700s Firmware, Netapp Hci Management Node and 4 more.

## How do I fix CVE-2020-13143?

Apply the vendor's patch.

## Is CVE-2020-13143 being exploited?

There is no known exploitation of CVE-2020-13143 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13143 and fix it if it is affected.

What it is: CVE-2020-13143 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 18 May 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-2020-13143 in the wild and no public exploit code.

Affected product: Canonical Ubuntu Linux. 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-2020-13143/ (Markdown: https://insights.sbomify.com/CVE-2020-13143/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13143
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13143
- OSV: https://osv.dev/vulnerability/CVE-2020-13143

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13143/
Summaries are generated and may contain mistakes; the official description above is the record.