What’s Vulnerable › Vulnerabilities

CVE-2016-5770

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-08-07 · updated 2026-06-17
• Weakness: CWE-190

Description

Integer overflow in the SplFileObject::fread function in spl_directory.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a large integer argument, a related issue to CVE-2016-5096.

Affected products

• Debian Linux: 8.0
• openSUSE Leap: 42.1
• Opensuse: 13.2
• PHP: before 5.5.37; from 5.6.0 before 5.6.23; from 7.0.0 before 7.0.8 — fixed in 5.5.37, 5.6.23, 7.0.8

How to fix

Upgrade to a fixed version: PHP 5.5.37, 5.6.23, 7.0.8. Check the vendor advisory for mitigations.

References

• http://github.com/php/php-src/commit/7245bff300d3fa8bacbef7897ff080a6f1c23eba?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/91403
• https://bugs.php.net/bug.php?id=72262
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
• https://support.apple.com/HT207170

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