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CVE-2019-11044

link() silently truncates after a null byte on Windows

HIGH
7.5
CVSS Score
Published: December 23, 2019 at 02:40 AM UTC
Updated: August 17, 2026 at 02:50 PM UTC
3 products affected across 3 vendorsFedoraPHPSecurity Center

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Severity
HIGH7.5
Exploit prediction
EPSS 5%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
3031
PHP· PHPdrupal
95%
7.2.0 ≤ v ≤ 7.2.267.2.x ≤ v < 7.2.267.3.0 ≤ v ≤ 7.3.137.3.x ≤ v < 7.3.137.4.x ≤ v < 7.4.17.2.x7.3.x7.4.07.4.x
Affected range stops below 7.2.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.3.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.4.1, so it looks safe — our inference, not a vendor statement
Security Center· Tenable
95%
v < 5.19.0
Affected range stops below 5.19.0, so it looks safe — our inference, not a vendor statement

References (5)

x_refsource_MISCExploitMailing ListPatchVendor Advisory
Source: [email protected]
https://bugs.php.net/bug.php?id=78862
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20200103-0002/
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://www.tenable.com/security/tns-2021-14

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-170NVD-CWE-Other

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