# CVE-2023-43755: Zavio IP Camera Stack-Based Buffer Overflow

> Remote attackers can execute arbitrary code on Zavio IP cameras via stack-based buffer overflows in XML parsing.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:** 8 Nov 2023
- **Updated:** 16 Jan 2025
- **Also known as:** GHSA-66rr-phv8-5jpp

## What is CVE-2023-43755?

CVE-2023-43755 is a critical memory corruption vulnerability in Zavio IP Camera B8220, published on 8 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Zavio CF7500, CF7300, CF7201, CF7501, CB3211, CB3212, CB5220,
 CB6231, B8520, B8220, and CD321 

IP Cameras 

with firmware version M2.1.6.05 are 
vulnerable to multiple instances of stack-based overflows. During the 
processing and parsing of certain fields in XML elements from incoming 
network requests, the product does not sufficiently check or validate 
allocated buffer size. This may lead to remote code execution.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2023-43755?

It affects 11 products.


Products: Zavio B8220 Firmware, Zavio B8520 Firmware, Zavio Cb3211 Firmware, Zavio Cb3212 Firmware, Zavio Cb5220 Firmware, Zavio Cb6231 Firmware, Zavio Cd321 Firmware, Zavio Cf7201 Firmware, Zavio Cf7300 Firmware, Zavio Cf7500 Firmware, Zavio Cf7501 Firmware.

## How do I fix CVE-2023-43755?

No fix has been published for CVE-2023-43755 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43755 being exploited?

There is no known exploitation of CVE-2023-43755 in the wild and no public exploit code.

## Other vulnerabilities in Zavio IP Camera B8220

- [CVE-2023-3959](https://insights.sbomify.com/CVE-2023-3959/): Zavio IP Camera Stack-Based Buffer Overflow (critical 9.8)
- [CVE-2023-45225](https://insights.sbomify.com/CVE-2023-45225/): Zavio IP Camera Stack-Based Buffer Overflow (critical 9.8)
- [CVE-2023-39435](https://insights.sbomify.com/CVE-2023-39435/): Zavio IP Camera Stack-Based Buffer Overflow (high 8.8)
- [CVE-2023-4249](https://insights.sbomify.com/CVE-2023-4249/): Zavio IP Camera Stack-Based Buffer Overflow (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43755 and fix it if it is affected.

What it is: CVE-2023-43755 is a critical memory corruption vulnerability in Zavio IP Camera B8220, published on 8 Nov 2023. 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-2023-43755 in the wild and no public exploit code.

Affected product: Zavio IP Camera B8220. 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-2023-43755/ (Markdown: https://insights.sbomify.com/CVE-2023-43755/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43755
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43755
- OSV: https://osv.dev/vulnerability/CVE-2023-43755

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43755/
Summaries are generated and may contain mistakes; the official description above is the record.