# CVE-2020-3343: Cisco AMP for Endpoints Linux Connector and AMP for Endpoints Mac Connector Software Memory Buffer Vulnerability

> A local authenticated attacker can cause a buffer overflow in Cisco AMP for Endpoints, leading to a service crash and restart.

- **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 May 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-fmpm-2fhr-jw4j

## What is CVE-2020-3343?

CVE-2020-3343 is a medium-severity memory corruption vulnerability in Cisco AMP for Endpoints, published on 22 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in Cisco AMP for Endpoints Linux Connector Software and Cisco AMP for Endpoints Mac Connector Software could allow an authenticated, local attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted packet to an affected device. A successful exploit could allow the attacker to cause the Cisco AMP for Endpoints service to crash and restart.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2020-3343?

It affects 1 product.


Products: Cisco Advanced Malware Protection for Endpoints.

## How do I fix CVE-2020-3343?

No fix has been published for CVE-2020-3343 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3343 being exploited?

There is no known exploitation of CVE-2020-3343 in the wild and no public exploit code.

## Other vulnerabilities in Cisco AMP for Endpoints

- [CVE-2021-1280](https://insights.sbomify.com/CVE-2021-1280/): Cisco Advanced Malware Protection for Endpoints and Immunet for Windows DLL Hijacking Vulnerability (high 7.8)
- [CVE-2021-1386](https://insights.sbomify.com/CVE-2021-1386/): Path traversal in Cisco AMP for Endpoints (high 7.0)
- [CVE-2019-1932](https://insights.sbomify.com/CVE-2019-1932/): Cisco Advanced Malware Protection for Endpoints Windows Command Injection Vulnerability (medium 6.7)
- [CVE-2017-12312](https://insights.sbomify.com/CVE-2017-12312/): Path traversal in Cisco Immunet Antimalware Installer (medium 6.7)
- [CVE-2020-3314](https://insights.sbomify.com/CVE-2020-3314/): Cisco AMP for Endpoints Mac Connector Software File Scan Denial of Service Vulnerability (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3343 and fix it if it is affected.

What it is: CVE-2020-3343 is a medium-severity memory corruption vulnerability in Cisco AMP for Endpoints, published on 22 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-3343 in the wild and no public exploit code.

Affected product: Cisco AMP for Endpoints. 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-2020-3343/ (Markdown: https://insights.sbomify.com/CVE-2020-3343/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3343
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3343
- OSV: https://osv.dev/vulnerability/CVE-2020-3343

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3343/
Summaries are generated and may contain mistakes; the official description above is the record.