---
title: "CVE-2015-4082\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-2015-4082?format=md
keywords: index, follow
---

# CVE-2015-4082

Publication date 18 August 2017

Last updated 25 August 2025

---

Ubuntu priority

**High**

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

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2015-4082?format=md#impact-score)

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## Description

attic before 0.15 does not confirm unencrypted backups with the user, which
allows remote attackers with read and write privileges for the encrypted
repository to obtain potentially sensitive information by changing the
manifest type byte of the repository to "unencrypted / without key file".

### From the Ubuntu Security Team

It was discovered that Attic could be manipulated into running in unencrypted
mode without warning the user. An attacker could use this vulnerability to
access sensitive information.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| attic | 19.04 disco | Not in release |
| 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not affected |
| 15.10 wily | Ignored end of life |
| 15.04 vivid | Ignored end of life |
| 14.10 utopic | Ignored end of life |
| 14.04 LTS trusty | Fixed 0.10-1.1ubuntu0.1+esm1  Ubuntu Pro |
| 12.04 LTS precise | 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-2015-4082?format=md#patch-details)

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### 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 |
| --- | --- |
| attic | * Upstream:   [78f9ad1](https://github.com/jborg/attic/commit/78f9ad1faba7193ca7f0acccbc13b1ff6ebf9072) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4082)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-4082)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-4082)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-4082)

### Other references

* <https://github.com/jborg/attic/issues/271>
* <https://github.com/jborg/attic/commit/78f9ad1faba7193ca7f0acccbc13b1ff6ebf9072>
* <http://www.openwall.com/lists/oss-security/2015/05/25/3>
* <https://www.cve.org/CVERecord?id=CVE-2015-4082>