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    CVE-2019-11049

    In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can result in double-freeing certain memory locations.

    Published:Dec 10, 2019
    Last Modified:Aug 17, 2026
    EPS:Dec 23, 2019
    EPSS Score:0.04218
    CVSS Score:6.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Php
    Product
    Php
    Vendor
    Tenable
    Product
    Security Center

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://bugs.php.net/bug.php?id=78943
    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://seclists.org/bugtraq/2020/Feb/27
    https://security.netapp.com/advisory/ntap-20200103-0002/
    https://www.debian.org/security/2020/dsa-4626
    https://www.tenable.com/security/tns-2021-14
    https://bugs.php.net/bug.php?id=78943
    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://seclists.org/bugtraq/2020/Feb/27
    https://security.netapp.com/advisory/ntap-20200103-0002/
    https://www.debian.org/security/2020/dsa-4626
    https://www.tenable.com/security/tns-2021-14

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High