critical
9.8
CWE
415
Advisory Published
Updated

CVE-2016-5768: Double Free

First published: Sun Aug 07 2016(Updated: )

Double free vulnerability in the _php_mb_regex_ereg_replace_exec function in php_mbregex.c in the mbstring extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) by leveraging a callback exception.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
PHP<7.0.8
7.0.8
PHP<=5.5.36
PHP=5.6.0-alpha1
PHP=5.6.0-alpha2
PHP=5.6.0-alpha3
PHP=5.6.0-alpha4
PHP=5.6.0-alpha5
PHP=5.6.0-beta1
PHP=5.6.0-beta2
PHP=5.6.0-beta3
PHP=5.6.0-beta4
PHP=5.6.1
PHP=5.6.2
PHP=5.6.3
PHP=5.6.4
PHP=5.6.5
PHP=5.6.6
PHP=5.6.7
PHP=5.6.8
PHP=5.6.9
PHP=5.6.10
PHP=5.6.11
PHP=5.6.12
PHP=5.6.13
PHP=5.6.14
PHP=5.6.15
PHP=5.6.16
PHP=5.6.17
PHP=5.6.18
PHP=5.6.19
PHP=5.6.20
PHP=5.6.21
PHP=5.6.22
PHP=7.0.0
PHP=7.0.1
PHP=7.0.2
PHP=7.0.3
PHP=7.0.4
PHP=7.0.5
PHP=7.0.6
PHP=7.0.7

Remedy

http://php.net/ChangeLog-5.php

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2016-5768?

    CVE-2016-5768 is considered a critical vulnerability that can allow remote attackers to execute arbitrary code or cause denial of service.

  • How do I fix CVE-2016-5768?

    To fix CVE-2016-5768, you should upgrade to PHP version 5.5.37, 5.6.23, or 7.0.8 or later.

  • Which versions of PHP are affected by CVE-2016-5768?

    CVE-2016-5768 affects PHP versions prior to 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8.

  • What is the impact of CVE-2016-5768 on PHP applications?

    The impact of CVE-2016-5768 includes potential execution of arbitrary code and application crashes.

  • Are there any workarounds for CVE-2016-5768?

    Currently, it is recommended to apply the updates as there are no effective workarounds for CVE-2016-5768.

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