---
title: "CVE-2015-4644\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-2015-4644?format=md
keywords: index, follow
---

# CVE-2015-4644

Publication date 18 June 2015

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2015-4644?format=md#impact-score)

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## Description

The php\_pgsql\_meta\_data function in pgsql.c in the PostgreSQL (aka pgsql)
extension in PHP before 5.4.42, 5.5.x before 5.5.26, and 5.6.x before
5.6.10 does not validate token extraction for table names, which might
allow remote attackers to cause a denial of service (NULL pointer
dereference and application crash) via a crafted name. NOTE: this
vulnerability exists because of an incomplete fix for CVE-2015-1352.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| php5 | 15.04 vivid | Fixed 5.6.4+dfsg-4ubuntu6.2 |
| 14.10 utopic | Fixed 5.5.12+dfsg-2ubuntu4.6 |
| 14.04 LTS trusty | Fixed 5.5.9+dfsg-1ubuntu4.11 |
| 12.04 LTS precise | Fixed 5.3.10-1ubuntu3.19 |

---

* [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-2015-4644?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 |
| --- | --- |
| php5 | * Upstream:   <http://git.php.net/?p=php-src.git;a=commit;h=2cc4e69cc6d8dbc4b3568ad3dd583324a7c11d64> * Upstream:   <http://git.php.net/?p=php-src.git;a=commit;h=3ee3066bd00b15b050c2f70ccf8d6a6373f51c09> |

## 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-2015-4644)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-4644)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-4644)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-4644)

### Related Ubuntu Security Notices (USN)

+ [USN-2658-1](https://usn.ubuntu.com/USN-2658-1)
+ PHP vulnerabilities
+ 6 July 2015

### Other references

* <http://www.openwall.com/lists/oss-security/2015/06/18/3>
* <https://www.cve.org/CVERecord?id=CVE-2015-4644>