It was discovered that python's functions urllib.parse.urlsplit and urllib.parse.urlparse do not properly handle URLs encoded with Punycode/Internationalizing Domain Names in Applications (IDNA), which may result in a wrong domain name (specifically the netloc component of URL - user@domain:port) being returned by those functions. When an application parses user-supplied URLs to store cookies, authentication credentials, or other kind of information, it is possible for an attacker to provide specially crafted URLs to make the application locate host-related information (e.g. cookies, authentication data) and send them to a different host than where it should, unlike if the URLs had been correctly parsed. The result of an attack may vary based on the application.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 2 - Core | python | 2019-06-25 21:04 | ALAS2-2019-1230 |
Amazon Linux 1 | python27 | 2019-06-25 21:32 | ALAS-2019-1230 |
Amazon Linux 2 - Core | python3 | 2019-05-02 18:48 | ALAS2-2019-1204 |
Amazon Linux 1 | python34 | 2019-11-19 17:31 | ALAS-2019-1324 |
Amazon Linux 1 | python34 | 2019-05-02 17:31 | ALAS-2019-1202 |
Amazon Linux 1 | python35 | 2019-07-17 23:51 | ALAS-2019-1243 |
Amazon Linux 1 | python36 | 2019-05-29 19:20 | ALAS-2019-1204 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
NVD | CVSSv3 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
NVD | CVSSv2 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |