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CVE-2019-16056

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Date: September 6, 2019

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.

Language: Python

Severity Score

7.5

Related Resources (60)

Url: https://www.oracle.com/security-alerts/cpuapr2020.html

Url: http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00063.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2019-16056

Url: https://bugs.python.org/issue34155

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E2HP37NUVLQSBW3J735A2DQDOZ4ZGBLY/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SDQQ56P7ZZR64XV5DUVWNSNXKKEXUG2J/

Url: https://access.redhat.com/errata/RHSA-2019:3948

Url: https://www.oracle.com/security-alerts/cpujul2020.html

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ER6LONC2B2WYIO56GBQUDU6QTWZDPUNQ/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QP46PQSUKYPGWTADQ67NOV3BUN6JM34Z/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OYGESQSGIHDCIGOBVF7VXCMIE6YDWRYB/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/

Url: http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00021.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/

Url: https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E

Url: https://nvd.nist.gov/vuln/detail/CVE-2019-16056

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K4KZEFP6E4YPYB52AF4WXCUDSGQOTF37/

Url: https://twitter.com/fs0c131y/status/1119143946687434753

Url: https://usn.ubuntu.com/4151-1/

Url: https://lists.debian.org/debian-lts-announce/2019/09/msg00019.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZBTGPBUABGXZ7WH7677OEM3NSP6ZEA76/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NF3DRDGMVIRYNZMSLJIHNW47HOUQYXVG/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SDQQ56P7ZZR64XV5DUVWNSNXKKEXUG2J/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QASRD4E2G65GGEHYKVHYCXB2XWAGTNL4/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OYGESQSGIHDCIGOBVF7VXCMIE6YDWRYB/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEARDOTXCYPYELKBD2KWZ27GSPXDI3GQ/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QP46PQSUKYPGWTADQ67NOV3BUN6JM34Z/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E2HP37NUVLQSBW3J735A2DQDOZ4ZGBLY/

Url: http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html

Url: https://lists.debian.org/debian-lts-announce/2019/09/msg00018.html

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/COATURTCY7G67AYI6UDV5B2JZTBCKIDX/

Url: https://security.alpinelinux.org/vuln/CVE-2019-16056

Url: https://security.netapp.com/advisory/ntap-20190926-0005/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QASRD4E2G65GGEHYKVHYCXB2XWAGTNL4/

Url: https://github.com/python/cpython/commit/8cb65d1381b027f0b09ee36bfed7f35bb4dec9a9

Url: https://usn.ubuntu.com/4151-2/

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NF3DRDGMVIRYNZMSLJIHNW47HOUQYXVG/

Url: https://access.redhat.com/errata/RHSA-2019:3725

Url: http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00012.html

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K4KZEFP6E4YPYB52AF4WXCUDSGQOTF37/

Url: https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BEARDOTXCYPYELKBD2KWZ27GSPXDI3GQ/

Url: https://security-tracker.debian.org/tracker/CVE-2019-16056

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ER6LONC2B2WYIO56GBQUDU6QTWZDPUNQ/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K7HNVIFMETMFWWWUNTB72KYJYXCZOS5V/

Url: https://medium.com/@fs0c131y/tchap-the-super-not-secure-app-of-the-french-government-84b31517d144

Url: https://access.redhat.com/security/cve/CVE-2019-16056

Url: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/

Url: https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@%3Cissues.bookkeeper.apache.org%3E

Url: https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html

Url: http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00062.html

Url: https://www.mend.io/resources/blog/top-security-open-source-vulnerabilities

Url: https://www.mend.io/resources/blog/top-5-new-open-source-vulnerabilities-in-september-2019

Url: https://www.mend.io/vulnerability-database/CVE-2019-16056

Severity Score

7.5

Weakness Type (CWE)

Input Validation

CWE-20

Insufficient Information

NVD-CWE-noinfo

Top Fix

Upgrade Version

Upgrade to version v3.5.8,v3.6.10,v3.7.5

CVSS v3.1

Base Score:	7.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	NONE
Availability (A):	NONE

CVSS v2

Base Score:	5.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	NONE
Confidentiality (C):	PARTIAL
Integrity (I):	NONE
Availability (A):	NONE
Additional information:

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