What’s Vulnerable › Vulnerabilities

CVE-2019-9021

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-02-22 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A heap-based buffer over-read in PHAR reading functions in the PHAR extension may allow an attacker to read allocated or unallocated memory past the actual data when trying to parse the file name, a different vulnerability than CVE-2018-20783. This is related to phar_detect_phar_fname_ext in ext/phar/phar.c.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04
• Debian Linux: 9.0
• NetApp Storage Automation Store: all versions
• openSUSE Leap: 42.3
• PHP: before 5.6.40; from 7.0.0 before 7.1.26; from 7.2.0 before 7.2.14; from 7.3.0 before 7.3.1 — fixed in 5.6.40, 7.1.26, 7.2.14, 7.3.1

How to fix

Upgrade to a fixed version: PHP 5.6.40, 7.1.26, 7.2.14, 7.3.1. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00083.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00041.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00044.html
• http://www.securityfocus.com/bid/106747
• http://www.securityfocus.com/bid/107156
• https://access.redhat.com/errata/RHSA-2019:2519
• https://access.redhat.com/errata/RHSA-2019:3299
• https://bugs.php.net/bug.php?id=77247
• https://security.netapp.com/advisory/ntap-20190321-0001/
• https://usn.ubuntu.com/3902-1/
• https://usn.ubuntu.com/3902-2/

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