Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0220 USN-4699-1: Apache Log4net vulnerability 20 January 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: log4net Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Modify Arbitrary Files -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-1285 Reference: ESB-2020.1753 Original Bulletin: https://ubuntu.com/security/notices/USN-4699-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4699-1: Apache Log4net vulnerability 19 January 2021 Apache Log4net could made to expose sensitive information if it received a specially crafted configuration file. Releases o Ubuntu 20.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Packages o log4net - Highly configurable logging API for the CLI log4net Details It was discovered that Apache Log4net incorrectly handled certain configuration files. An attacker could possibly use this issue to expose sensitive information. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10 o liblog4net1.2-cil - 1.2.10+dfsg-7ubuntu0.20.10.1 Ubuntu 20.04 o liblog4net1.2-cil - 1.2.10+dfsg-7ubuntu0.20.04.1 Ubuntu 18.04 o liblog4net1.2-cil - 1.2.10+dfsg-7ubuntu0.18.04.1 Ubuntu 16.04 o liblog4net1.2-cil - 1.2.10+dfsg-7ubuntu0.16.04.1 In general, a standard system update will make all the necessary changes. References o CVE-2018-1285 - --------------------------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 iQIVAwUBYAd32ONLKJtyKPYoAQjZkhAArqmB35WEQJy+9pOHROe58NqFsadRISzW cDFAUnXxTI9y0easnZ/ZZghbSwrgiyJKDABvThyrZo8kU9Y4GHD91bGqAmd7ZcU+ ZPg1XNtY9wFUb6BNcJAvYQmhm7WsQ/Q+bKSlJp606ZCn6V/+6NrUX8JvRMMGZDS+ s+LUARNICRs5ML4Bv/rKwKJnji4TUQbsS40c1snmEFHEmLvqNLrKkk4yaoaFNYGL nMZtzR1cUOE+gSkO9vxLQSjJywSQXu7jBr7vTvx6I1TpyxAke36vcVoIIOlk/F2i yx5Ut/XzhHSWTAvZmFRxE5BwMF47BX5Hr88y/k4QgtYmw43XtUnJdo5q44OmzeWv 7x/InLW2P9qfC4YGxM4ZBX3BX0R7BuIHxTpBqpMrrJH5T85PMct/g4JqhHvTXHPz Mhv45fziTg9ypiBig1m/1DQNO0TUpBsQQarsXZxeGbjODxlNlB1KyVjjqoByYeOv NKsp5RmhG6gdpqy88XlQ7gAK6TLvQoUzADOIErsmKBOcf/yGGgkXwNk72q/MgJus 7XCaCf5OQIPvnQHtHtBYFJW3kCZe+k3gQnwp4d62P70U6GrtFgpEPhMmymJXDEEA 4l0P9XZbKM63xEd2bmgYJ1uLN8P7Qt89saXhrktmsIjlrMqkCLuVgQFI6IxWfG2D 5nbHd8g0LC4= =Hx5H -----END PGP SIGNATURE-----