# CVE-2023-31475: Memory corruption in n/a

> A buffer overflow in GL.iNet router firmware allows attackers to execute arbitrary code or cause denial of service via crafted UCI requests.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/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 May 2023
- **Updated:** 27 Jan 2025
- **Also known as:** CVE-2023-33622, GHSA-27c8-cpgv-r39p

## What is CVE-2023-31475?

CVE-2023-31475 is a critical memory corruption vulnerability in n/a, published on 11 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on GL.iNet devices before 3.216. The function guci2_get() found in libglutil.so has a buffer overflow when an item is requested from a UCI context, and the value is pasted into a char pointer to a buffer without checking the size of the buffer.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2023-31475?

It affects 32 products.


Products: Gl-Inet Gl-A1300 Firmware, Gl-Inet Gl-Ap1300 Firmware, Gl-Inet Gl-Ap1300lte Firmware, Gl-Inet Gl-Ar300m Firmware, Gl-Inet Gl-Ar750 Firmware, Gl-Inet Gl-Ar750s Firmware, Gl-Inet Gl-Ax1800 Firmware, Gl-Inet Gl-Axt1800 Firmware, Gl-Inet Gl-B1300 Firmware, Gl-Inet Gl-B2200 Firmware, Gl-Inet Gl-E750 Firmware, Gl-Inet Gl-Mifi Firmware, Gl-Inet Gl-Mt1300 Firmware, Gl-Inet Gl-Mt2500 Firmware, Gl-Inet Gl-Mt2500a Firmware, Gl-Inet Gl-Mt3000 Firmware, Gl-Inet Gl-Mt300n-V2 Firmware, Gl-Inet Gl-Mv1000 Firmware, Gl-Inet Gl-Mv1000w Firmware, Gl-Inet Gl-S10 Firmware and 12 more.

## How do I fix CVE-2023-31475?

No fix has been published for CVE-2023-31475 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-31475 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-31475 exists.

## Other vulnerabilities in n/a

- [CVE-2023-50919](https://insights.sbomify.com/CVE-2023-50919/): Auth bypass in n/a (critical 9.8)
- [CVE-2023-50921](https://insights.sbomify.com/CVE-2023-50921/): Privilege escalation in n/a (critical 9.8)
- [CVE-2023-31471](https://insights.sbomify.com/CVE-2023-31471/): Security feature bypass in n/a (critical 9.8)
- [CVE-2023-50445](https://insights.sbomify.com/CVE-2023-50445/): Command injection in n/a (high 7.8)
- [CVE-2023-31477](https://insights.sbomify.com/CVE-2023-31477/): Path traversal in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-31475 and fix it if it is affected.

What it is: CVE-2023-31475 is a critical memory corruption vulnerability in n/a, published on 11 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-31475 exists.

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-2023-31475/ (Markdown: https://insights.sbomify.com/CVE-2023-31475/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-31475
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-31475
- OSV: https://osv.dev/vulnerability/CVE-2023-31475

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-31475/
Summaries are generated and may contain mistakes; the official description above is the record.