CVE-2019-16056

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    CVE-2019-16056

    Published: 6 Sept 2019Last Modified: 7 Aug 2026

    Summary:

    Details: An issue was discovered in Python through 2.7.16, 3.x through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through 3.7.4. The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied. An attack may be the same as in CVE-2019-11340; however, this CVE applies to Python more generally.

    References: https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEARDOTXCYPYELKBD2KWZ27GSPXDI3GQ/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E2HP37NUVLQSBW3J735A2DQDOZ4ZGBLY/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ER6LONC2B2WYIO56GBQUDU6QTWZDPUNQ/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K4KZEFP6E4YPYB52AF4WXCUDSGQOTF37/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NF3DRDGMVIRYNZMSLJIHNW47HOUQYXVG/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OYGESQSGIHDCIGOBVF7VXCMIE6YDWRYB/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QASRD4E2G65GGEHYKVHYCXB2XWAGTNL4/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QP46PQSUKYPGWTADQ67NOV3BUN6JM34Z/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SDQQ56P7ZZR64XV5DUVWNSNXKKEXUG2J/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/, http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00062.html, http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00063.html, http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00012.html, http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00021.html, http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html, https://access.redhat.com/errata/RHSA-2019:3725, https://access.redhat.com/errata/RHSA-2019:3948, https://lists.debian.org/debian-lts-announce/2019/09/msg00018.html, https://lists.debian.org/debian-lts-announce/2019/09/msg00019.html, https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html, https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html, https://security.netapp.com/advisory/ntap-20190926-0005/, https://usn.ubuntu.com/4151-1/, https://usn.ubuntu.com/4151-2/, https://bugs.python.org/issue34155, https://github.com/python/cpython/commit/8cb65d1381b027f0b09ee36bfed7f35bb4dec9a9, https://www.oracle.com/security-alerts/cpuapr2020.html, https://www.oracle.com/security-alerts/cpujul2020.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v3.7.4
    v3.7.4rc2
    v3.7.4rc1
    v3.7.3rc1
    v3.7.2rc1
    v3.7.0rc1
    v3.7.0b5
    v3.7.0b4
    v3.7.0b3
    v3.7.0b2
    v3.7.0b1
    v3.7.0a2

    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
    CVE-2019-16056 | CVE-DB