CVE-2016-5771: Use After Free
First published: Sun Aug 07 2016(Updated: )
spl_array.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| PHP | <5.5.37 | |
| PHP | >=5.6.0<5.6.23 | |
| PHP | >=7.0.0<7.0.8 | |
| SUSE Linux | =42.1 | |
| SUSE Linux | =13.2 | |
| Debian | =8.0 |
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Reference Links
- http://github.com/php/php-src/commit/3f627e580acfdaf0595ae3b115b8bec677f203ee?w=1
- http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00004.html
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00003.html
- http://php.net/ChangeLog-5.php
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://www.debian.org/security/2016/dsa-3618
- http://www.openwall.com/lists/oss-security/2016/06/23/4
- http://www.securityfocus.com/bid/91401
- https://bugs.php.net/bug.php?id=72433
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
- https://support.apple.com/HT207170
Frequently Asked Questions
What is the severity of CVE-2016-5771?
The severity of CVE-2016-5771 is considered critical due to the potential for remote code execution and denial of service.
How do I fix CVE-2016-5771?
To fix CVE-2016-5771, upgrade to PHP version 5.5.37, 5.6.23 or later, or apply the relevant patches to affected software.
Which PHP versions are affected by CVE-2016-5771?
CVE-2016-5771 affects PHP versions prior to 5.5.37 and versions between 5.6.0 and 5.6.23, as well as certain 7.0.x versions before 7.0.8.
Can CVE-2016-5771 be exploited remotely?
Yes, CVE-2016-5771 can be exploited remotely by attackers to execute arbitrary code via crafted serialized data.
What are the potential impacts of CVE-2016-5771?
The potential impacts of CVE-2016-5771 include arbitrary code execution and application crashes due to use-after-free vulnerabilities.
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