CVE-2017-6441

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-04-03 · updated 2026-06-17
Weakness: CWE-476

Description

The _zval_get_long_func_ex in Zend/zend_operators.c in PHP 7.1.2 allows attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted use of "declare(ticks=" in a PHP script. NOTE: the vendor disputes the classification of this as a vulnerability, stating "Please do not request CVEs for ordinary bugs. CVEs are relevant for security issues only.

Affected products

PHP: 7.1.2

References

https://bugs.php.net/bug.php?id=74146
https://github.com/php/php-src/pull/2396
https://bugs.php.net/bug.php?id=74146
https://github.com/php/php-src/pull/2396

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