---
title: "CVE-2015-2312\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-2015-2312?format=md
keywords: index, follow
---

# CVE-2015-2312

Publication date 9 August 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-2015-2312?format=md#impact-score)

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## Description

Sandstorm Cap'n Proto before 0.4.1.1 and 0.5.x before 0.5.1.1 allows remote
peers to cause a denial of service (CPU and possibly general resource
consumption) via a list with a large number of elements.

### From the Ubuntu Security Team

It was discovered that the Cap'n Proto utility has a buffer overflow
vulnerability. An attacker could use this vulnerability to cause a crash or
possibly execute arbitrary code.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2015-2312?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| capnproto | 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Not affected |
| 15.10 wily | Ignored end of life |
| 14.04 LTS trusty | Fixed 0.4.0-1ubuntu2.1 |
| 12.04 LTS precise | Not in release |
| 10.04 LTS lucid | 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)

## Notes

---

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

Fixed in 0.4.1.1, 0.5.1.1, and 0.6

## 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 | None |
  | Availability impact | High |
* 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:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2312)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-2312)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-2312)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-2312)

### Other references

* <https://github.com/sandstorm-io/capnproto/blob/master/security-advisories/2015-03-02-2-all-cpu-amplification.md>
* <https://www.cve.org/CVERecord?id=CVE-2015-2312>