CVE-2019-11044: link() silently truncates after a null byte on Windows
First published: Tue Dec 17 2019(Updated: )
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.
Credit: security@php.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| <7.2.26 | 7.2.26 | |
| PHP PHP | >=7.2.0<=7.2.26 | |
| PHP PHP | >=7.3.0<=7.3.13 | |
| PHP PHP | =7.4.0 | |
| Tenable SecurityCenter | <5.19.0 | |
| Fedoraproject Fedora | =30 | |
| Fedoraproject Fedora | =31 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugs.php.net/bug.php?id=78862
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
- https://security.netapp.com/advisory/ntap-20200103-0002/
- https://www.tenable.com/security/tns-2021-14
- https://www.php.net/ChangeLog-7.php#7.2.26 (Advisory)
- 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/
Frequently Asked Questions
What is CVE-2019-11044?
CVE-2019-11044 is a vulnerability in PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0 on Windows, where the link() function accepts filenames with embedded \0 byte and treats them as terminating at that byte, potentially leading to security vulnerabilities.
How severe is CVE-2019-11044?
The severity of CVE-2019-11044 is high with a severity value of 7.5.
How can I fix CVE-2019-11044?
To fix CVE-2019-11044, upgrade PHP to version 7.2.26 or above, 7.3.13 or above, or 7.4.0 or above depending on the affected version.
What are some references for CVE-2019-11044?
You can find more information about CVE-2019-11044 at these references: [Reference 1](https://www.php.net/ChangeLog-7.php#7.2.26), [Reference 2](https://bugs.php.net/bug.php?id=78862), [Reference 3](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/).
What is the CWE of CVE-2019-11044?
The CWE of CVE-2019-11044 is CWE-170.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/php-changelog
- source/PHP
- agent/software-canonical-lookup
- agent/remedy
- agent/author
- agent/weakness
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/last-modified-date
- agent/severity
- agent/references
- agent/tags
- agent/first-publish-date
- agent/event
- vendor/php
- canonical/php php
- version/php php/7.2.0
- version/php php/7.2.26
- version/php php/7.3.0
- version/php php/7.3.13
- version/php php/7.4.0
- vendor/tenable
- canonical/tenable securitycenter
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/30
- version/fedoraproject fedora/31