---
title: "CVE-2017-3225\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-3225?format=md
keywords: index, follow
---

# CVE-2017-3225

Publication date 24 July 2018

Last updated 25 August 2025

---

Ubuntu priority

**Negligible**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**4.6 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-3225?format=md#impact-score)

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## Description

Das U-Boot is a device bootloader that can read its configuration from an
AES encrypted file. For devices utilizing this environment encryption mode,
U-Boot's use of a zero initialization vector may allow attacks against the
underlying cryptographic implementation and allow an attacker to decrypt
the data. Das U-Boot's AES-CBC encryption feature uses a zero (0)
initialization vector. This allows an attacker to perform dictionary
attacks on encrypted data produced by Das U-Boot to learn information about
the encrypted data.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-3225?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| u-boot | 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2017-3225?format=md#patch-details)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

xenial doesn't build with ENV\_AES, and later releases removed
the code completely

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| u-boot | * Upstream:   [c6831c7](https://github.com/u-boot/u-boot/commit/c6831c74a9e9dbedc351de94d23d35188ae1a39b) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

4.6 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Physical |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | None |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 4.6 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3225)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-3225)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-3225)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-3225)

### Other references

* <https://www.kb.cert.org/vuls/id/166743>
* <https://www.cve.org/CVERecord?id=CVE-2017-3225>