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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.1908 USN-4378-1: Flask vulnerability 2 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: flask Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-1000656 Reference: ESB-2019.3184 ESB-2019.0912 Original Bulletin: https://usn.ubuntu.com/4378-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4378-1: Flask vulnerability 1 June 2020 flask vulnerability A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS o Ubuntu 14.04 ESM Summary Flask could be made to consume a large amount of memory if it received a specially crafted input. Software Description o flask - Micro web framework based on Werkzeug and Jinja2 Details It was discovered that Flask incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS python-flask - 0.12.2-3ubuntu0.1 python3-flask - 0.12.2-3ubuntu0.1 Ubuntu 16.04 LTS python-flask - 0.10.1-2ubuntu0.1 python3-flask - 0.10.1-2ubuntu0.1 Ubuntu 14.04 ESM python-flask - 0.10.1-2ubuntu0.1~esm1 python3-flask - 0.10.1-2ubuntu0.1~esm1 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o CVE-2018-1000656 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXtWXIuNLKJtyKPYoAQghnhAArpvADgjwrOQN3wx2mNcYrOkSkmN0NePH O6H9H5LEmr4yLVbGS0ztuwRzrG14qAHEr2wZw/e6N20/T5TSjsJWM0Ri2QRLhALc qNo0Pq2ufxx6b4ZEnttwPsO2B58Ctri24yJVa5DY3uKocgsHdA6lPCuf9f34D27u znKrsX88pztAjbK50gXXhlZ7X2/0ErtNivJz7znyGAw03awetAkwB/y2rEsUohHa n2BcxLX+yAb+HwvGpWKoI7R4tftpfj8H4n/693iLd4oLa5yje+eu2XUCyEYRlbIq e1c4XUi3OR1Q02KmvQV+hjasEmhhXA4RzrZFLWtoEj0HBBKL3GKRCjpYEsUmN7bk Kec87ovQ34dHGXTTuJhNA1dw2iyvAlJedBQF4NQp21POQkHrwRlo5XYxe3Tgncv8 A6iflDaFT31HyBlbJeOP0yzh4fgf3xeVePNA168G9OL8aBgjZd4x+RZyAh2+Dkge dwSJbRKb++ZqZAqiV8XR4rvPecmHhMFszAmXOfZRoR12lmJpEFf3qlbtejDKkDkp YPTF1axsWUF4eeJeOv+qT8JNChY0lk4rpM9it3dHybwuesvZbyJJsKlFsaxHsqR9 jhhsnD/JheyxeF3UPPQk1M3BybBrdyXG+CsbU7Mn1nV3Gmp+vDFW/oJmkhxsoOO4 itLPJ0mPImU= =UQSu -----END PGP SIGNATURE-----