high
7.5
CWE
20
Advisory Published
CVE Published
Updated

CVE-2019-16056: Input Validation

First published: Thu Jul 19 2018(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/python<0:2.7.5-88.el7
0:2.7.5-88.el7
redhat/python3<0:3.6.8-13.el7
0:3.6.8-13.el7
redhat/python<0:2.7.5-87.el7_7
0:2.7.5-87.el7_7
redhat/python3<0:3.6.8-23.el8
0:3.6.8-23.el8
redhat/rh-python36-python<0:3.6.9-2.el6
0:3.6.9-2.el6
redhat/python27-python<0:2.7.17-2.el6
0:2.7.17-2.el6
redhat/rh-python36-python<0:3.6.9-2.el7
0:3.6.9-2.el7
redhat/python27-python<0:2.7.17-2.el7
0:2.7.17-2.el7
redhat/python<3.7.5
3.7.5
redhat/python<2.7.17
2.7.17
debian/python2.7
2.7.18-8+deb11u1
IBM Data Risk Manager<=2.0.6
Python 2.7<=2.7.16
Python 2.7>=3.0.0<=3.0.1
Python 2.7>=3.1.0<=3.1.5
Python 2.7>=3.2.0<=3.2.6
Python 2.7>=3.3.0<=3.3.7
Python 2.7>=3.4.0<=3.4.10
Python 2.7>=3.5.0<=3.5.7
Python 2.7>=3.6.0<=3.6.9
Python 2.7>=3.7.0<=3.7.4
Fedora=29
Fedora=30
Fedora=31
Debian=8.0
Debian=9.0
Ubuntu=12.04
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=19.04
Red Hat Software Collections=1.0
Oracle Communications Operations Monitor>=4.1<=4.3
Oracle Communications Operations Monitor=3.4
Oracle Peoplesoft Enterprise Campus Software Campus Community=8.57
Oracle Peoplesoft Enterprise Campus Software Campus Community=8.58
Oracle Storage Cloud Software Appliance=8.8
Oracle Solaris and Zettabyte File System (ZFS)=11
SUSE Linux=15.0
SUSE Linux=15.1

Remedy

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

Remedy

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

Remedy

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

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2019-16056?

    CVE-2019-16056 is classified as a moderate severity vulnerability due to improper parsing of email addresses.

  • How do I fix CVE-2019-16056?

    To fix CVE-2019-16056, upgrade to Python versions 2.7.18, 3.6.10, 3.7.5 or later.

  • Which versions of Python are affected by CVE-2019-16056?

    CVE-2019-16056 affects Python versions up to 2.7.16 and 3.x through 3.7.4.

  • What components are impacted by CVE-2019-16056?

    The email module in Python is specifically impacted by CVE-2019-16056.

  • Is CVE-2019-16056 exploitable in any specific applications?

    Yes, applications that use the email module and perform checks on From/To headers may be vulnerable to exploitation.

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