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Ubuntu: (Multiple Advisories) (CVE-2023-23934): Werkzeug vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2023-23934): Werkzeug vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/14/2023
Created
03/29/2023
Added
03/22/2023
Modified
06/21/2023

Description

Werkzeug is a comprehensive WSGI web application library. Browsers may allow "nameless" cookies that look like `=value` instead of `key=value`. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie like `=__Host-test=bad` for another subdomain. Werkzeug prior to 2.2.3 will parse the cookie `=__Host-test=bad` as __Host-test=bad`. If a Werkzeug application is running next to a vulnerable or malicious subdomain which sets such a cookie using a vulnerable browser, the Werkzeug application will see the bad cookie value but the valid cookie key. The issue is fixed in Werkzeug 2.2.3.

Solution(s)

  • ubuntu-upgrade-python-werkzeug
  • ubuntu-upgrade-python3-werkzeug

References

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