CVE-2019-16056
Published: 06 September 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.
Priority
Medium
CVSS 3 base score: 7.5
Status
| Package | Release | Status |
|---|---|---|
|
python2.7 Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.04 (Hirsute Hippo) |
Not vulnerable
(2.7.17~rc1-1)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(2.7.17~rc1-1)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(2.7.15-4ubuntu4~18.04.2)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(2.7.12-1ubuntu0~16.04.9)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(2.7.6-8ubuntu0.6+esm3)
|
|
|
Patches: Upstream: https://github.com/python/cpython/commit/4cbcd2f8c4e12b912e4d21fd892eedf7a3813d8e |
||
|
python3.4 Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.04 (Hirsute Hippo) |
Does not exist
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(3.4.3-1ubuntu1~14.04.7+esm4)
|
|
|
python3.5 Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.04 (Hirsute Hippo) |
Does not exist
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(3.5.2-2ubuntu0~16.04.9)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Needs triage
|
|
|
Patches: Upstream: https://github.com/python/cpython/commit/063eba280a11d3c9a5dd9ee5abe4de640907951b |
||
|
python3.6 Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.04 (Hirsute Hippo) |
Does not exist
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(3.6.8-1~18.04.3)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
Patches: Upstream: https://github.com/python/cpython/commit/13a19139b5e76175bc95294d54afc9425e4f36c9 |
||
|
python3.7 Launchpad, Ubuntu, Debian |
Upstream |
Released
(3.7.4-4)
|
| Ubuntu 21.04 (Hirsute Hippo) |
Does not exist
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Does not exist
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Needs triage
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Does not exist
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Does not exist
|
|
|
Patches: Upstream: https://github.com/python/cpython/commit/c48d606adcef395e59fd555496c42203b01dd3e8 |
||
Notes
| Author | Note |
|---|---|
| seth-arnold | This has a very high risk of regression. Email addresses should not be validated beyond making sure there's at least one byte on both sides of an '@' sign. Legal email addresses are significantly more complicated than what is easy to express in regex. Whatever validation this module provides is in my opinion suspect. |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16056
- https://ubuntu.com/security/notices/USN-4151-1
- https://ubuntu.com/security/notices/USN-4151-2
- NVD
- Launchpad
- Debian