---
title: "CVE-2014-0143\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-2014-0143?format=md
keywords: index, follow
---

# CVE-2014-0143

Publication date 26 March 2014

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.0 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2014-0143?format=md#impact-score)

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## Description

Multiple integer overflows in the block drivers in QEMU, possibly before
2.0.0, allow local users to cause a denial of service (crash) via a crafted
catalog size in (1) the parallels\_open function in block/parallels.c or (2)
bochs\_open function in bochs.c, a large L1 table in the (3)
qcow2\_snapshot\_load\_tmp in qcow2-snapshot.c or (4) qcow2\_grow\_l1\_table
function in qcow2-cluster.c, (5) a large request in the
bdrv\_check\_byte\_request function in block.c and other block drivers, (6)
crafted cluster indexes in the get\_refcount function in qcow2-refcount.c,
or (7) a large number of blocks in the cloop\_open function in cloop.c,
which trigger buffer overflows, memory corruption, large memory allocations
and out-of-bounds read and writes.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qemu | 14.04 LTS trusty | Not affected |
| 13.10 saucy | Ignored end of life |
| 12.10 quantal | Not in release |
| 12.04 LTS precise | Not in release |
| 10.04 LTS lucid | Not in release |
| qemu-kvm | 14.04 LTS trusty | Not in release |
| 13.10 saucy | Not in release |
| 12.10 quantal | Ignored end of life |
| 12.04 LTS precise | Fixed 1.0+noroms-0ubuntu14.17 |
| 10.04 LTS lucid | Fixed 0.12.3+noroms-0ubuntu9.24 |

---

* [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-2014-0143?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 |
| --- | --- |
| qemu | * Other:   <https://lists.gnu.org/archive/html/qemu-devel/2014-03/msg04994.html> * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=509a41bab5306181044b5fff02eadf96d9c8676a> * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=e3737b820b45e54b059656dc3f914f895ac7a88b> * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=db8a31d11d6a60f48d6817530640d75aa72a9a2f> * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=cab60de930684c33f67d4e32c7509b567f8c445b> * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=6a83f8b5bec6f59e56cc49bd49e4c3f8f805d56f> * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=afbcc40bee4ef51731102d7d4b499ee12fc182e1> * Upstream:   <http://git.qemu.org/?p=qemu.git;a=commit;h=8f4754ede56e3f9ea3fd7207f4a7c4453e59285b> |
| qemu-kvm | * Other:   <https://lists.gnu.org/archive/html/qemu-devel/2014-03/msg04994.html> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.0 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.0 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0143)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-0143)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-0143)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-0143)

### Related Ubuntu Security Notices (USN)

+ [USN-2342-1](https://usn.ubuntu.com/USN-2342-1)
+ QEMU vulnerabilities
+ 8 September 2014

### Other references

* <http://www.openwall.com/lists/oss-security/2014/03/26>
* <https://www.cve.org/CVERecord?id=CVE-2014-0143>