---
title: "CVE-2016-9122\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-2016-9122?format=md
keywords: index, follow
---

# CVE-2016-9122

Publication date 28 March 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2016-9122?format=md#impact-score)

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## Description

go-jose before 1.0.4 suffers from multiple signatures exploitation. The
go-jose library supports messages with multiple signatures. However, when
validating a signed message the API did not indicate which signature was
valid, which could potentially lead to confusion. For example, users of the
library might mistakenly read protected header values from an attached
signature that was different from the one originally validated.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| golang-gopkg-square-go-jose.v1 | 17.04 zesty | Not affected |
| 16.10 yakkety | Ignored end of life |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| 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)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9122)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-9122)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-9122)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-9122)

### Other references

* <http://www.openwall.com/lists/oss-security/2016/11/03/1>
* <https://github.com/square/go-jose/commit/2c5656adca9909843c4ff50acf1d2cf8f32da7e6>
* <https://hackerone.com/reports/169629>
* <https://www.cve.org/CVERecord?id=CVE-2016-9122>