--- title: "CVE-2018-20783\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-2018-20783?format=md keywords: index, follow --- # CVE-2018-20783 Publication date 21 February 2019 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-2018-20783?format=md#impact-score) Toggle side navigation ## Description In PHP before 5.6.39, 7.x before 7.0.33, 7.1.x before 7.1.25, and 7.2.x before 7.2.13, a buffer over-read in PHAR reading functions may allow an attacker to read allocated or unallocated memory past the actual data when trying to parse a .phar file. This is related to phar\_parse\_pharfile in ext/phar/phar.c. [Read the notes from the security team](https://ubuntu.com/security/CVE-2018-20783?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | php5 | 19.04 disco | Not in release | | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Fixed 5.5.9+dfsg-1ubuntu4.29+esm2 Ubuntu Pro | | php7.0 | 19.04 disco | Not in release | | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Fixed 7.0.33-0ubuntu0.16.04.1 | | 14.04 LTS trusty | Not in release | | php7.2 | 19.04 disco | Fixed 7.2.15-0ubuntu0.18.04.1 | | 18.10 cosmic | Fixed 7.2.15-0ubuntu0.18.04.1 | | 18.04 LTS bionic | Fixed 7.2.15-0ubuntu0.18.04.1 | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | php7.3 | 19.04 disco | Not in release | | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 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-2018-20783?format=md#patch-details) ### Get expanded security coverage with Ubuntu Pro Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use. [Get Ubuntu Pro](https://ubuntu.com/pro) [30-day free trial](https://ubuntu.com/pro/free-trial) ## Notes --- ### [sbeattie](https://launchpad.net/~sbeattie) PEAR issues should go against php-pear as of xenial ### 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: | ## 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 | High | | Integrity impact | None | | 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:H/I:N/A:N ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20783) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-20783) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-20783) * [Debian](https://security-tracker.debian.org/tracker/CVE-2018-20783) ### Related Ubuntu Security Notices (USN) + [USN-3566-2](https://usn.ubuntu.com/USN-3566-2) + PHP vulnerabilities + 22 May 2019 ### Other references * * *