What’s Vulnerable › Vulnerabilities

CVE-2019-11044: link() silently truncates after a null byte on Windows

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-12-23 · updated 2026-08-17
• Weakness: CWE-170

Description

In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0 on Windows, PHP link() function accepts filenames with embedded \0 byte and treats them as terminating at that byte. This could lead to security vulnerabilities, e.g. in applications checking paths that the code is allowed to access.

Affected products

• Fedoraproject Fedora: 30, 31
• PHP: from 7.2.0 through 7.2.26; from 7.3.0 through 7.3.13; 7.4.0
• Tenable, Inc. Security Center: before 5.19.0 — fixed in 5.19.0

How to fix

Upgrade to a fixed version: Tenable, Inc. Security Center 5.19.0. Check the vendor advisory for mitigations.

References

• https://bugs.php.net/bug.php?id=78862
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
• https://security.netapp.com/advisory/ntap-20200103-0002/
• https://www.tenable.com/security/tns-2021-14
• https://bugs.php.net/bug.php?id=78862
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
• https://security.netapp.com/advisory/ntap-20200103-0002/
• https://www.tenable.com/security/tns-2021-14

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