critical
9.8
CWE
416
Advisory Published
Updated

CVE-2016-5773: Use After Free

First published: Sun Aug 07 2016(Updated: )

php_zip.c in the zip extension in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8 improperly interacts with the unserialize implementation and garbage collection, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and application crash) via crafted serialized data containing a ZipArchive object.

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=5.6.23
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

Remedy

http://php.net/ChangeLog-7.php

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2016-5773?

    CVE-2016-5773 is considered critical as it allows remote attackers to execute arbitrary code or cause a denial of service.

  • How do I fix CVE-2016-5773?

    To mitigate CVE-2016-5773, upgrade PHP to version 5.5.37, 5.6.23, or 7.0.8 or later.

  • Which versions of PHP are affected by CVE-2016-5773?

    CVE-2016-5773 affects PHP versions before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8.

  • What types of attacks can CVE-2016-5773 enable?

    CVE-2016-5773 can enable attackers to execute arbitrary code or trigger an application crash.

  • Is there a workaround for CVE-2016-5773?

    There are no specific workarounds; the best course of action is to update to a patched version of PHP.

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