Improper Input Validation Affecting php7.0 package, versions <7.0.33-0ubuntu0.16.04.16+esm3


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.54% (79th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Improper Input Validation vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-UBUNTU1604-PHP70-386363
  • published12 May 2017
  • disclosed12 May 2017

Introduced: 12 May 2017

CVE-2017-8923  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 php7.0 to version 7.0.33-0ubuntu0.16.04.16+esm3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php7.0 package and not the php7.0 package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.

CVSS Scores

version 3.1