---
title: "CVE-2015-9096\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-2015-9096?format=md
keywords: index, follow
---

# CVE-2015-9096

Publication date 12 June 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**6.1 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2015-9096?format=md#impact-score)

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## Description

Net::SMTP in Ruby before 2.4.0 is vulnerable to SMTP command injection via
CRLF sequences in a RCPT TO or MAIL FROM command, as demonstrated by CRLF
sequences immediately before and after a DATA substring.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ruby1.9.1 | 17.04 zesty | Not in release |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Fixed 1.9.3.484-2ubuntu1.3 |
| ruby2.0 | 17.04 zesty | Not in release |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Fixed 2.0.0.484-1ubuntu2.4 |
| ruby2.3 | 17.04 zesty | Fixed 2.3.3-1ubuntu0.1 |
| 16.10 yakkety | Ignored end of life |
| 16.04 LTS xenial | Fixed 2.3.1-2~16.04.2 |
| 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-2015-9096?format=md#patch-details)

### 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 |
| --- | --- |
| ruby2.3 | * Upstream:   [0827a7e](https://github.com/ruby/ruby/commit/0827a7e52ba3d957a634b063bf5a391239b9ffee) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.1 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.1 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-9096)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-9096)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-9096)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-9096)

### Related Ubuntu Security Notices (USN)

+ [USN-3365-1](https://usn.ubuntu.com/USN-3365-1)
+ Ruby vulnerabilities
+ 25 July 2017

### Other references

* <http://www.mbsd.jp/Whitepaper/smtpi.pdf>
* <https://hackerone.com/reports/137631>
* <https://www.cve.org/CVERecord?id=CVE-2015-9096>