Use After Free in PHP
CVE-2016-9936
The unserialize implementation in ext/standard/var.c in PHP 7.x before 7.0.14 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted serialized data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-6834.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.043 (90.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.043 · newest: 0.043 · change: 0.000
Affected products
- PHP — versions 7.0.0, 7.0.1, 7.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2016/12/12/2 (mailing-list, Mailing List)
- www.php.net/ChangeLog-7.php (Patch, Release Notes)
- github.com/php/php-src/commit/b2af4e8868726a040234de113436c6e4f6372d17 (Patch)
- access.redhat.com/errata/RHSA-2018:1296 (vendor-advisory)
- bugs.php.net/bug.php (Exploit, Issue Tracking)
- lists.opensuse.org/opensuse-updates/2017-01/msg00034.html (vendor-advisory)
- www.securityfocus.com/bid/94849 (vdb-entry)
Frequently asked questions
- What is CVE-2016-9936?
- CVE-2016-9936 is a critical-severity vulnerability in PHP, classified under Use After Free. CVSS score: 9.8/10. Published 2017-01-04.
- How severe is CVE-2016-9936?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2016-9936 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.