Security update for python-Flask SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2023:2263-1 Final 1 1 2023-05-22T10:16:24Z current 2023-05-22T10:16:24Z 2023-05-22T10:16:24Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for python-Flask This update for python-Flask fixes the following issues: - CVE-2023-30861: Fixed a potential cookie confusion due to incorrect caching (bsc#1211246). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). Container suse/manager/5.0/x86_64/server:latest-2023-2263,Container suse/multi-linux-manager/5.1/x86_64/server:latest-2023-2263,Image SLES15-SP4-Manager-Server-4-3-2023-2263,Image SLES15-SP4-Manager-Server-4-3-Azure-llc-2023-2263,Image SLES15-SP4-Manager-Server-4-3-Azure-ltd-2023-2263,Image SLES15-SP4-Manager-Server-4-3-EC2-llc-2023-2263,Image SLES15-SP4-Manager-Server-4-3-EC2-ltd-2023-2263,Image server-image-2023-2263,SUSE-2023-2263,SUSE-SLE-Module-Basesystem-15-SP4-2023-2263,SUSE-SLE-Module-Basesystem-15-SP5-2023-2263,openSUSE-SLE-15.4-2023-2263 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2023/suse-su-20232263-1/ Link for SUSE-SU-2023:2263-1 https://lists.suse.com/pipermail/sle-security-updates/2023-May/014935.html E-Mail link for SUSE-SU-2023:2263-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1211246 SUSE Bug 1211246 https://www.suse.com/security/cve/CVE-2023-30861/ SUSE CVE CVE-2023-30861 page Container suse/manager/5.0/x86_64/server:latest Container suse/multi-linux-manager/5.1/x86_64/server:latest Image SLES15-SP4-Manager-Server-4-3 Image SLES15-SP4-Manager-Server-4-3-Azure-llc Image SLES15-SP4-Manager-Server-4-3-Azure-ltd Image SLES15-SP4-Manager-Server-4-3-EC2-llc Image SLES15-SP4-Manager-Server-4-3-EC2-ltd Image server-image SUSE Linux Enterprise Module for Basesystem 15 SP4 SUSE Linux Enterprise Module for Basesystem 15 SP5 openSUSE Leap 15.4 python3-Flask-1.0.4-150400.3.3.1 python3-Flask-doc-1.0.4-150400.3.3.1 python3-Flask-1.0.4-150400.3.3.1 as a component of Container suse/manager/5.0/x86_64/server:latest python3-Flask-1.0.4-150400.3.3.1 as a component of Container suse/multi-linux-manager/5.1/x86_64/server:latest python3-Flask-1.0.4-150400.3.3.1 as a component of Image SLES15-SP4-Manager-Server-4-3 python3-Flask-1.0.4-150400.3.3.1 as a component of Image SLES15-SP4-Manager-Server-4-3-Azure-llc python3-Flask-1.0.4-150400.3.3.1 as a component of Image SLES15-SP4-Manager-Server-4-3-Azure-ltd python3-Flask-1.0.4-150400.3.3.1 as a component of Image SLES15-SP4-Manager-Server-4-3-EC2-llc python3-Flask-1.0.4-150400.3.3.1 as a component of Image SLES15-SP4-Manager-Server-4-3-EC2-ltd python3-Flask-1.0.4-150400.3.3.1 as a component of Image server-image python3-Flask-1.0.4-150400.3.3.1 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP4 python3-Flask-1.0.4-150400.3.3.1 as a component of SUSE Linux Enterprise Module for Basesystem 15 SP5 python3-Flask-1.0.4-150400.3.3.1 as a component of openSUSE Leap 15.4 python3-Flask-doc-1.0.4-150400.3.3.1 as a component of openSUSE Leap 15.4 Flask is a lightweight WSGI web application framework. When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by the proxy to other clients. If the proxy also caches `Set-Cookie` headers, it may send one client's `session` cookie to other clients. The severity depends on the application's use of the session and the proxy's behavior regarding cookies. The risk depends on all these conditions being met. 1. The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies. 2. The application sets `session.permanent = True` 3. The application does not access or modify the session at any point during a request. 4. `SESSION_REFRESH_EACH_REQUEST` enabled (the default). 5. The application does not set a `Cache-Control` header to indicate that a page is private or should not be cached. This happens because vulnerable versions of Flask only set the `Vary: Cookie` header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified. This issue has been fixed in versions 2.3.2 and 2.2.5. CVE-2023-30861 Container suse/manager/5.0/x86_64/server:latest:python3-Flask-1.0.4-150400.3.3.1 Container suse/multi-linux-manager/5.1/x86_64/server:latest:python3-Flask-1.0.4-150400.3.3.1 Image SLES15-SP4-Manager-Server-4-3-Azure-llc:python3-Flask-1.0.4-150400.3.3.1 Image SLES15-SP4-Manager-Server-4-3-Azure-ltd:python3-Flask-1.0.4-150400.3.3.1 Image SLES15-SP4-Manager-Server-4-3-EC2-llc:python3-Flask-1.0.4-150400.3.3.1 Image SLES15-SP4-Manager-Server-4-3-EC2-ltd:python3-Flask-1.0.4-150400.3.3.1 Image SLES15-SP4-Manager-Server-4-3:python3-Flask-1.0.4-150400.3.3.1 Image server-image:python3-Flask-1.0.4-150400.3.3.1 SUSE Linux Enterprise Module for Basesystem 15 SP4:python3-Flask-1.0.4-150400.3.3.1 SUSE Linux Enterprise Module for Basesystem 15 SP5:python3-Flask-1.0.4-150400.3.3.1 openSUSE Leap 15.4:python3-Flask-1.0.4-150400.3.3.1 openSUSE Leap 15.4:python3-Flask-doc-1.0.4-150400.3.3.1 important 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2023/suse-su-20232263-1/ https://www.suse.com/security/cve/CVE-2023-30861.html CVE-2023-30861 https://bugzilla.suse.com/1211246 SUSE Bug 1211246