CVE-2016-5114: Buffer Overflow
First published: Sun Aug 07 2016(Updated: )
sapi/fpm/fpm/fpm_log.c in PHP before 5.5.31, 5.6.x before 5.6.17, and 7.x before 7.0.2 misinterprets the semantics of the snprintf return value, which allows attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and buffer overflow) via a long string, as demonstrated by a long URI in a configuration with custom REQUEST_URI logging.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| PHP | <7.0.2 | 7.0.2 |
| PHP | <=5.5.30 | |
| 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 | =7.0.0 | |
| PHP | =7.0.1 |
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Reference Links
- http://github.com/php/php-src/commit/2721a0148649e07ed74468f097a28899741eb58f?w=1
- http://php.net/ChangeLog-5.php
- http://php.net/ChangeLog-7.php
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://www.openwall.com/lists/oss-security/2016/05/29/1
- http://www.search-lab.hu/about-us/news/111-some-unusual-vulnerabilities-in-the-php-engine
- https://bugs.php.net/bug.php?id=70755
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
- https://www.php.net/ChangeLog-7.php#7.0.2 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2016-5114?
CVE-2016-5114 has a high severity rating due to its potential to expose sensitive information and cause denial of service.
How do I fix CVE-2016-5114?
To fix CVE-2016-5114, upgrade to PHP version 5.5.31, 5.6.17, or 7.0.2 or later.
What types of attacks can CVE-2016-5114 enable?
CVE-2016-5114 can enable attackers to read sensitive process memory or trigger a buffer overflow.
Which PHP versions are affected by CVE-2016-5114?
CVE-2016-5114 affects PHP versions earlier than 5.5.31, 5.6.x before 5.6.17, and earlier than 7.0.2.
Is CVE-2016-5114 considered a critical vulnerability?
Yes, CVE-2016-5114 is considered critical due to its potential for significant exploitation risks.
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