What’s Vulnerable › Vulnerabilities
CVE-2019-16056
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 5.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2019-09-06 · updated 2026-10-14
- Weakness: CWE-20
Description
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.
Affected products
- Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04, 19.04
- Debian Linux: 8.0, 9.0
- Fedoraproject Fedora: 29, 30, 31
- openSUSE Leap: 15.0, 15.1
- Oracle Corporation Communications Operations Monitor: from 4.1 through 4.3; 3.4
- Oracle Corporation PeopleSoft Enterprise PT PeopleTools: 8.57, 8.58
- Oracle Corporation Solaris Operating System: 11
- Oracle Corporation Oracle ZFS Storage Appliance Kit: 8.8
- Python: through 2.7.16; from 3.0.0 through 3.0.1; from 3.1.0 through 3.1.5; from 3.2.0 through 3.2.6; from 3.3.0 through 3.3.7; from 3.4.0 through 3.4.10
- RedHat Software Collections: 1.0
References
- 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://bugs.python.org/issue34155
- https://github.com/python/cpython/commit/8cb65d1381b027f0b09ee36bfed7f35bb4dec9a9
- https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2019/09/msg00018.html
- https://lists.debian.org/debian-lts-announce/2019/09/msg00019.html
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