What’s Vulnerable › Vulnerabilities

CVE-2017-16642

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 26.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-11-07 · updated 2026-06-17
• Weakness: CWE-125

Description

In PHP before 5.6.32, 7.x before 7.0.25, and 7.1.x before 7.1.11, an error in the date extension's timelib_meridian handling of 'front of' and 'back of' directives could be used by attackers able to supply date strings to leak information from the interpreter, related to ext/date/lib/parse_date.c out-of-bounds reads affecting the php_parse_date function. NOTE: this is a different issue than CVE-2017-11145.

Affected products

• Canonical Ubuntu Linux: 14.04
• Debian Linux: 8.0, 9.0
• Clustered Data ONTAP: all versions
• NetApp Storage Automation Store: all versions
• PHP: before 5.6.32; from 7.0.0 before 7.0.25; from 7.1.0 before 7.1.11 — fixed in 5.6.32, 7.0.25, 7.1.11

How to fix

Upgrade to a fixed version: PHP 5.6.32, 7.0.25, 7.1.11. Check the vendor advisory for mitigations.

References

• http://php.net/ChangeLog-5.php
• http://php.net/ChangeLog-7.php
• http://www.securityfocus.com/bid/101745
• https://access.redhat.com/errata/RHSA-2018:1296
• https://access.redhat.com/errata/RHSA-2019:2519
• https://bugs.php.net/bug.php?id=75055
• https://github.com/derickr/timelib/commit/aa9156006e88565e1f1a5f7cc088b18322d57536
• https://github.com/php/php-src/commit/5c0455bf2c8cd3c25401407f158e820aa3b239e1
• https://security.netapp.com/advisory/ntap-20181123-0001/
• https://usn.ubuntu.com/3566-1/
• https://www.debian.org/security/2018/dsa-4080
• https://www.debian.org/security/2018/dsa-4081

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