PyPi: Python

CVE-2018-20852

Safety vulnerability ID: 45679

This vulnerability was reviewed by experts

The information on this page was manually curated by our Cybersecurity Intelligence Team.

Created at Jul 13, 2019 Updated at Dec 03, 2024

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Advisory

Python versions 2.7.16, 3.4.10, 3.5.7, 3.6.9 and 3.7.3 include a fix for CVE-2018-20852: 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.
https://bugs.python.org/issue35121

Affected package

python

Latest version: 0.9.8

Affected versions

Fixed versions

Vulnerability changelog

This vulnerability has no description

Resources

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Severity Details

CVSS Base Score

MEDIUM 5.3

CVSS v3 Details

MEDIUM 5.3

Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality Impact (C): LOW
Integrity Impact (I): NONE
Availability Availability (A): NONE

CVSS v2 Details

MEDIUM 5.0

Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (Au): NONE
Confidentiality Impact (C): PARTIAL
Integrity Impact (I): NONE
Availability Impact (A): NONE