Vulnerability · NVD

CVE-2018-20852

CVE-2018-20852, medium severity (CVSS 5.3): 3 tracked apps concerned, all fixed or indeterminable on their current version.

Severity (CVSS): 5.3
Exploitation: 3.9 %
Tracked apps: 3
Still exposed: 0

Published on 2019-07-13

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.

Attack vector : Network No privileges required No user interaction

Show raw CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS 3.88% above median percentile 89.9%

Tracked apps referencing this CVE

For each app: the affected range, the fixing version, and where the tracked app stands today.

Python 3.12 Windows winget:Python.Python.3.12

Affected ≥2.0 ≤2.7.16 Fixed in > 2.7.16 Latest tracked 3.12.10 patched
Python 3.13 Windows winget:Python.Python.3.13

Affected ≥2.0 ≤2.7.16 Fixed in > 2.7.16 Latest tracked 3.13.15 patched
Python 3.14 Windows winget:Python.Python.3.14

Affected ≥2.0 ≤2.7.16 Fixed in > 2.7.16 Latest tracked 3.14.7 patched

Vulnerable CPE configurations (5)

Vendor	Product	Platform	Versions	CPE 2.3 URI
python	python All platforms (wildcard)	All platforms (wildcard)	≥2.0 ≤2.7.16	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.0.0 <3.4.10	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.5.0 <3.5.7	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.6.0 <3.6.9	cpe:2.3:a:python:python::::::::
python	python All platforms (wildcard)	All platforms (wildcard)	≥3.7.0 <3.7.3	cpe:2.3:a:python:python::::::::

View on NVD ↗ Advisory · bugs.python.org Advisory · python-security.readthedocs.io

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