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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.036 (89.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000
Affected products
- PHP — versions 7.0.0, 7.0.1, 7.0.2
Weakness classification (CWE)
References
- bugs.php.net/bug.php (Third Party Advisory, Issue Tracking)
- www.securityfocus.com/bid/100428 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2018:1296 (vendor-advisory)
- www.debian.org/security/2018/dsa-4080 (vendor-advisory)
- php.net/ChangeLog-7.php (Vendor Advisory)
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.