Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1099 USN-4896-1: lxml vulnerability 31 March 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: lxml Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Cross-site Scripting -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-28957 Reference: ESB-2021.1081 ESB-2021.1037 Original Bulletin: https://ubuntu.com/security/notices/USN-4896-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4896-1: lxml vulnerability 30 March 2021 lxml could allow cross-site scripting (XSS) attacks. Releases o Ubuntu 20.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Packages o lxml - pythonic binding for the libxml2 and libxslt libraries Details It was discovered that lxml incorrectly handled certain HTML attributes. A remote attacker could possibly use this issue to perform cross-site scripting (XSS) attacks. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10 o python3-lxml - 4.5.2-1ubuntu0.4 Ubuntu 20.04 o python3-lxml - 4.5.0-1ubuntu0.3 o python-lxml - 4.5.0-1ubuntu0.3 Ubuntu 18.04 o python3-lxml - 4.2.1-1ubuntu0.4 o python-lxml - 4.2.1-1ubuntu0.4 Ubuntu 16.04 o python3-lxml - 3.5.0-1ubuntu0.4 o python-lxml - 3.5.0-1ubuntu0.4 In general, a standard system update will make all the necessary changes. References o CVE-2021-28957 - --------------------------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 iQIVAwUBYGPXlONLKJtyKPYoAQicsA/+Oikb5RzSsMM68i9P49BrFXo6bXTESFML /FsdyIyrEDQj9MLajEZDzKPUnvJLzOUHWGUhxZXC1cIPLjEkieK+XBbUM6y4voU6 3gNXAmaoNnTicgr5OR/IOIVVREBC3HW7mU/MVU0gMsYF0R3x+jezGVNxHm4bmk2A zSQSIZ7gwdyGpYx/lA5SeXjrrzRUWzvy1dq2fzkVi9D10SexLWV9mTnBG/q4bm9/ P4VaE1GiWu7QzfoQVJKK2VMtOwQimol7eavqt0fU7133FjjFYAR2UUikoSWG5pqA bpxW+MWUcBnKwtmy7a4JxfpT5wqmHc7gjoG235xrwt3zWWEdytUvFQwl8B0RQQOC gnDOcxpV+0dkz7oWlLhvyQgHsbjyrMJnBunNuVsXNBdrsl4all/J6wXxXj+PLg8u ILDAKgFZDCIpKLvkNpW9n3emOmkH6Lkj2XeM/wCfG+5CrHTu9KISFYXsXsYkHF6t cgWJm91lzSewJO0MVH2jUDZkQqx0ektSJQdQPhc+UwHSQjtxSsIovXIzezIGRyAe XqA/VYX7MTkgNbm80AYlwoBFyIcq/1yzDhZE+ybzSUi4ZL36LGJ8ilBJ18QsIffF WmGcQytKqRgGnZbTREnZ4JtHyFfPWoYKRl++tVhYc/z2znlSPjdMzWNEZ8CxcvBf FWIk3ZV0GZk= =QN1+ -----END PGP SIGNATURE-----