CVE-2016-7479: Use After Free
First published: Thu Jan 12 2017(Updated: )
In all versions of PHP 7, during the unserialization process, resizing the 'properties' hash table of a serialized object may lead to use-after-free. A remote attacker may exploit this bug to gain arbitrary code execution.
Credit: cve@checkpoint.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/php | <7.0.15 | 7.0.15 |
| redhat/php | <7.1.1 | 7.1.1 |
| PHP | <7.0.15 | 7.0.15 |
| 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 | |
| PHP | =7.0.8 | |
| PHP | =7.0.9 | |
| PHP | =7.0.10 | |
| PHP | =7.0.11 | |
| PHP | =7.0.12 | |
| PHP | =7.0.14 | |
| PHP | =7.1.0 |
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Reference Links
- http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7
- http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf
- http://www.securityfocus.com/bid/95151
- http://www.securitytracker.com/id/1037659
- https://access.redhat.com/errata/RHSA-2018:1296
- https://bugs.php.net/bug.php?id=73092
- https://security.netapp.com/advisory/ntap-20180112-0001/
- https://www.youtube.com/watch?v=LDcaPstAuPk
- https://www.php.net/ChangeLog-7.php#7.0.15 (Advisory)
- https://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1412647
- https://bugzilla.redhat.com/show_bug.cgi?id=1412686
Frequently Asked Questions
What is the severity of CVE-2016-7479?
CVE-2016-7479 is considered critical due to its potential for arbitrary code execution.
How do I fix CVE-2016-7479?
To fix CVE-2016-7479, upgrade PHP to version 7.0.15 or 7.1.1 or later.
What versions of PHP are affected by CVE-2016-7479?
All versions of PHP 7 prior to 7.0.15 and 7.1.1 are affected by CVE-2016-7479.
Can CVE-2016-7479 be exploited remotely?
Yes, CVE-2016-7479 can be exploited remotely by an attacker to execute arbitrary code.
What type of vulnerability is CVE-2016-7479?
CVE-2016-7479 is characterized as a use-after-free vulnerability that occurs during the unserialization process.
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