Use After Free in Php

CVE-2017-12934

ext/standard/var_unserializer.re in PHP 7.0.x before 7.0.21 and 7.1.x before 7.1.7 is prone to a heap use after free while unserializing untrusted data, related to the zval_get_type function in Zend/zend_types.h. Exploitation of this issue can have an unspecified impact on the integrity of PHP.

Vulnerability class: Use-After-Free

EPSS: 0.036 (88.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

  • Php — versions 7.0.0, 7.0.1, 7.0.2
  • N/a — versions n/a

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2017-12934?
CVE-2017-12934 is a high-severity vulnerability in Php, classified under Use After Free. CVSS score: 7.5/10. Published 2017-08-18.
How severe is CVE-2017-12934?
High severity. CVSS v3 base score is 7.5 out of 10.