CVE-2018-20852
Published: 13 July 2019
http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
python2.7 Launchpad, Ubuntu, Debian |
bionic |
Released
(2.7.15-4ubuntu4~18.04.1)
|
| cosmic |
Ignored
(reached end-of-life)
|
|
| disco |
Released
(2.7.16-2ubuntu0.1)
|
|
| eoan |
Not vulnerable
(2.7.16-3)
|
|
| focal |
Not vulnerable
(2.7.16-3)
|
|
| groovy |
Not vulnerable
(2.7.16-3)
|
|
| hirsute |
Not vulnerable
(2.7.16-3)
|
|
| impish |
Not vulnerable
(2.7.16-3)
|
|
| jammy |
Not vulnerable
(2.7.16-3)
|
|
| kinetic |
Not vulnerable
(2.7.16-3)
|
|
| precise |
Released
(2.7.3-0ubuntu3.14)
|
|
| trusty |
Released
(2.7.6-8ubuntu0.6+esm2)
|
|
| upstream |
Released
(2.7.16-3)
|
|
| xenial |
Released
(2.7.12-1ubuntu0~16.04.8)
|
|
|
Patches: upstream: https://github.com/python/cpython/commit/979daae300916adb399ab5b51410b6ebd0888f13 |
||
|
python3.4 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Released
(3.4.3-1ubuntu1~14.04.7+esm2)
|
|
| upstream |
Released
(3.4.10)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/python/cpython/commit/42ad4101d3ba7ca3c371dadf0f8880764c9f15fb |
||
|
python3.5 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Needed
|
|
| upstream |
Released
(3.5.7)
|
|
| xenial |
Released
(3.5.2-2ubuntu0~16.04.8)
|
|
|
Patches: upstream: https://github.com/python/cpython/commit/4749f1b69000259e23b4cc6f63c542a9bdc62f1b |
||
|
python3.6 Launchpad, Ubuntu, Debian |
bionic |
Released
(3.6.8-1~18.04.2)
|
| cosmic |
Ignored
(reached end-of-life)
|
|
| disco |
Does not exist
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(3.6.9)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/python/cpython/commit/b241af861b37e20ad30533bc0b7e2e5491cc470f |
||
|
python3.7 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(3.7.3-2)
|
| cosmic |
Not vulnerable
(3.7.3-2)
|
|
| disco |
Not vulnerable
(3.7.3-2)
|
|
| eoan |
Not vulnerable
(3.7.3-2)
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(3.7.3~rc1-1)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/python/cpython/commit/e5123d81ffb3be35a1b2767d6ced1a097aaf77be |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |