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Debian: CVE-2018-20852: python2.7 -- security update

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Debian: CVE-2018-20852: python2.7 -- security update

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
07/13/2019
Created
08/20/2019
Added
08/19/2019
Modified
11/27/2024

Description

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.

Solution(s)

  • debian-upgrade-python2-7

References

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