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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| PHP Group | PHP | >= 7.2.x, < 7.2.26; >= 7.3.x, < 7.3.13; >= 7.4.x, < 7.4.1 |
References
- https://bugs.php.net/bug.php?id=78862Exploit, Mailing List, Patch, Vendor 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/
- https://security.netapp.com/advisory/ntap-20200103-0002/Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
- https://bugs.php.net/bug.php?id=78862Exploit, Mailing List, Patch, Vendor 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/
- https://security.netapp.com/advisory/ntap-20200103-0002/Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
Timeline
- Published
- Dec 23, 2019
- Last modified
- Aug 17, 2026
- NVD status
- Modified