What’s Vulnerable › Vulnerabilities

CVE-2017-5340

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 16.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-01-11 · updated 2026-06-17
• Weakness: CWE-190

Description

Zend/zend_hash.c in PHP before 7.0.15 and 7.1.x before 7.1.1 mishandles certain cases that require large array allocations, which allows remote attackers to execute arbitrary code or cause a denial of service (integer overflow, uninitialized memory access, and use of arbitrary destructor function pointers) via crafted serialized data.

Affected products

• Clustered Data ONTAP: all versions
• PHP: from 7.0.0 before 7.0.15; from 7.1.0 before 7.1.1 — fixed in 7.0.15, 7.1.1

How to fix

Upgrade to a fixed version: PHP 7.0.15, 7.1.1. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/95371
• http://www.securitytracker.com/id/1037659
• https://access.redhat.com/errata/RHSA-2018:1296
• https://bugs.php.net/bug.php?id=73832
• https://github.com/php/php-src/commit/4cc0286f2f3780abc6084bcdae5dce595daa3c12
• https://security.netapp.com/advisory/ntap-20180112-0001/
• http://www.securityfocus.com/bid/95371
• http://www.securitytracker.com/id/1037659
• https://access.redhat.com/errata/RHSA-2018:1296
• https://bugs.php.net/bug.php?id=73832
• https://github.com/php/php-src/commit/4cc0286f2f3780abc6084bcdae5dce595daa3c12
• https://security.netapp.com/advisory/ntap-20180112-0001/

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