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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-1889-1 python3.4 security update
Debian DLA Debian DLA DLA-1906-1 python2.7 security update
Debian DLA Debian DLA DLA-2280-1 python3.5 security update
Debian DLA Debian DLA DLA-2337-1 python2.7 security update
EUVD EUVD EUVD-2018-13392 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.
Ubuntu USN Ubuntu USN USN-4127-1 Python vulnerabilities
Ubuntu USN Ubuntu USN USN-4127-2 Python vulnerabilities
Ubuntu USN Ubuntu USN USN-6891-1 Python vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T12:12:29.756Z

Reserved: 2019-07-13T00:00:00

Link: CVE-2018-20852

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-07-13T21:15:10.377

Modified: 2024-11-21T04:02:18.780

Link: CVE-2018-20852

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-10-31T00:00:00Z

Links: CVE-2018-20852 - Bugzilla

cve-icon OpenCVE Enrichment

No data.