CVE-2017-12934

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.36%
Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory php.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.php.net/bug.php?id=74101 third party advisory issue tracking
http://www.securityfocus.com/bid/100428 third party advisory vdb entry
https://access.redhat.com/errata/RHSA-2018:1296 vendor advisory
https://www.debian.org/security/2018/dsa-4080 vendor advisory
http://php.net/ChangeLog-7.php vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-12934?
CVE-2017-12934 has been scored as a high severity vulnerability.
How to fix CVE-2017-12934?
To fix CVE-2017-12934, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-12934 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-12934 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.