# CVE-2023-20079: Cisco IP Phone 6800, 7800, 7900, and 8800 Series Web UI Vulnerabilities

> Unauthenticated remote attackers can execute arbitrary code or cause denial of service on Cisco IP Phones via the web management interface.

- **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:** 3 Mar 2023
- **Updated:** 28 Oct 2024
- **Also known as:** GHSA-5mh2-xjxr-6c3g

## What is CVE-2023-20079?

CVE-2023-20079 is a critical memory corruption vulnerability in Cisco IP Phones with Multiplatform Firmware, published on 3 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple vulnerabilities in the web-based management interface of certain Cisco IP Phones could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition. For more information about these vulnerabilities, see the Details section of this advisory.

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

## Which versions are affected by CVE-2023-20079?

It affects 21 products.


Products: Cisco Ip Phone 6825 Firmware, Cisco Ip Phone 6841 Firmware, Cisco Ip Phone 6851 Firmware, Cisco Ip Phone 6861 Firmware, Cisco Ip Phone 6871 Firmware, Cisco Ip Phone 7811 Firmware, Cisco Ip Phone 7821 Firmware, Cisco Ip Phone 7832 Firmware, Cisco Ip Phone 7841 Firmware, Cisco Ip Phone 7861 Firmware, Cisco Ip Phone 8811 Firmware, Cisco Ip Phone 8831 Firmware, Cisco Ip Phone 8832 Firmware, Cisco Ip Phone 8841 Firmware, Cisco Ip Phone 8845 Firmware, Cisco Ip Phone 8851 Firmware, Cisco Ip Phone 8861 Firmware, Cisco Ip Phone 8865 Firmware, Cisco Unified Ip Phone 7945g Firmware, Cisco Unified Ip Phone 7965g Firmware and 1 more.

## How do I fix CVE-2023-20079?

No fix has been published for CVE-2023-20079 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-20079 being exploited?

There is no known exploitation of CVE-2023-20079 in the wild and no public exploit code.

## Other vulnerabilities in Cisco IP Phones with Multiplatform Firmware

- [CVE-2023-20078](https://insights.sbomify.com/CVE-2023-20078/): Cisco IP Phone 6800, 7800, 7900, and 8800 Series Web UI Vulnerabilities (critical 9.8)
- [CVE-2022-20774](https://insights.sbomify.com/CVE-2022-20774/): Cisco IP Phone 6800, 7800, and 8800 Series with Multiplatform Firmware Cross-Site Request Forgery Vulnerability (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-20079 and fix it if it is affected.

What it is: CVE-2023-20079 is a critical memory corruption vulnerability in Cisco IP Phones with Multiplatform Firmware, published on 3 Mar 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-2023-20079 in the wild and no public exploit code.

Affected product: Cisco IP Phones with Multiplatform Firmware. 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-2023-20079/ (Markdown: https://insights.sbomify.com/CVE-2023-20079/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-20079
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20079
- OSV: https://osv.dev/vulnerability/CVE-2023-20079

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-20079/
Summaries are generated and may contain mistakes; the official description above is the record.