What’s Vulnerable › Vulnerabilities

CVE-2018-20783

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-02-21 · updated 2026-06-17
• Weakness: CWE-125

Description

In PHP before 5.6.39, 7.x before 7.0.33, 7.1.x before 7.1.25, and 7.2.x before 7.2.13, a buffer over-read in PHAR reading functions may allow an attacker to read allocated or unallocated memory past the actual data when trying to parse a .phar file. This is related to phar_parse_pharfile in ext/phar/phar.c.

Affected products

• openSUSE Leap: 42.3
• PHP: before 5.6.39; from 7.0.0 before 7.0.33; from 7.1.0 before 7.1.25; from 7.2.0 before 7.2.13 — fixed in 5.6.39, 7.0.33, 7.1.25, 7.2.13

How to fix

Upgrade to a fixed version: PHP 5.6.39, 7.0.33, 7.1.25, 7.2.13. 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://php.net/ChangeLog-5.php
• http://php.net/ChangeLog-7.php
• https://access.redhat.com/errata/RHSA-2019:2519
• https://access.redhat.com/errata/RHSA-2019:3299
• https://bugs.php.net/bug.php?id=77143
• https://usn.ubuntu.com/3566-2/
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00083.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html

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