CVE-2016-5773: Use After Free

Published Aug 7, 2016
·
Updated

phpzip.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.

Other sources

Fixed bug (ZipArchive class Use After Free Vulnerability in PHP's GC algorithm and unserialize). (CVE-2016-5773)

— PHP

Affected Software

42 affected componentsFixes available
PHP PHP<=5.5.36
PHP PHP=5.6.0-alpha1
PHP PHP=5.6.0-alpha2
PHP PHP=5.6.0-alpha3
PHP PHP=5.6.0-alpha4
PHP PHP=5.6.0-alpha5
PHP PHP=5.6.0-beta1
PHP PHP=5.6.0-beta2
PHP PHP=5.6.0-beta3
PHP PHP=5.6.0-beta4
PHP PHP=5.6.1
PHP PHP=5.6.2
PHP PHP=5.6.3
PHP PHP=5.6.4
PHP PHP=5.6.5
PHP PHP=5.6.6
PHP PHP=5.6.7
PHP PHP=5.6.8
PHP PHP=5.6.9
PHP PHP=5.6.10
PHP PHP=5.6.11
PHP PHP=5.6.12
PHP PHP=5.6.13
PHP PHP=5.6.14
PHP PHP=5.6.15
PHP PHP=5.6.16
PHP PHP=5.6.17
PHP PHP=5.6.18
PHP PHP=5.6.19
PHP PHP=5.6.20
PHP PHP=5.6.21
PHP PHP=5.6.22
PHP PHP=5.6.23
PHP PHP=7.0.0
PHP PHP=7.0.1
PHP PHP=7.0.2
PHP PHP=7.0.3
PHP PHP=7.0.4
PHP PHP=7.0.5
PHP PHP=7.0.6
PHP PHP=7.0.7
PHP PHP<7.0.8
7.0.8

Remediation

Patch Available

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

Patch Available

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

Event History

Aug 7, 2016
CVE Published
via MITRE·10:00 AM
Data Sourced
via MITRE·10:00 AM
Description

Frequently Asked Questions

1

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.

2

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.

3

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.

4

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

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

5

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.

Company

Resources

Contact

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