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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.0188 USN-5223-1: Apache Log4j 1.2 vulnerability 14 January 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Apache log4j Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-4104 Reference: ESB-2022.0151 ESB-2022.0090 ESB-2022.0070 ESB-2022.0030 Original Bulletin: https://ubuntu.com/security/notices/USN-5223-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5223-1: Apache Log4j 1.2 vulnerability 12 January 2022 Apache Log4j 1.2 could be made to crash or run programs if it received specially crafted input. Releases o Ubuntu 21.10 o Ubuntu 21.04 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o apache-log4j1.2 - Java-based open-source logging tool Details It was discovered that Apache Log4j 1.2 was vulnerable to deserialization of untrusted data if the configuration file was editable. An attacker could use this vulnerability to cause a DoS or possibly execute arbitrary code. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 21.10 o liblog4j1.2-java - 1.2.17-10ubuntu0.21.10.1 Ubuntu 21.04 o liblog4j1.2-java - 1.2.17-10ubuntu0.21.04.1 Ubuntu 20.04 o liblog4j1.2-java - 1.2.17-9ubuntu0.1 Ubuntu 18.04 o liblog4j1.2-java - 1.2.17-8+deb10u1ubuntu0.1 In general, a standard system update will make all the necessary changes. References o CVE-2021-4104 - --------------------------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 iQIVAwUBYeDrHONLKJtyKPYoAQhJ7A//WrGckcr+KtvjZq3+gfHWtoQZNSmnRvJQ EiejlKnjEEzzvSliCEcaKQMhXOECCx1OGeVWZLLYeMuwNkBQhKRuUpgJCdtD8Z78 LhPJ2m/zP8iVk9ig37NNkWDDLn0UenHDaN/sZaRLwAMfTPaBWDnBZVdPUELkoqtg 3ZqmCL6/lS0TbfV3L2W8ySZmqdbedpO4Oh5RX4xJby5RHzhUVrA5eF+0WtQBco4z pCuNTUA66Jm5PHIZKDWSGM5dcTovPuLcnVhFJ5Q3y+tX7IQ8ilK+MDAVoZljZhyv R3YS4ICM4aK4LXqPAXMTlSG3YPcsA/fro39y1lJ9P4uI+9kvX7iqT3CQWhBon+GL nj4qxiEqueZDTtjMvtIBYOYHBl+Y8pbbeud+PduFJ2Wf9rXN/4NazQ3mt2IdbAaX hxGlyebvzL32Xho+qEH0lIVyrMqChGoErpDnk1Sqol9j7RGCv+tN5Mkv2SLGpIq5 jxVhOa9KZuldOLSJ7epsTgkGbKMhXU2QbGybLYOArwkRTd2X7NxF+rS36Yr2Et4A B48n/m/rjF3u7Kz7+Zzxt2GoGvrXM91BATUIOgz7CIBSabma7E3TcfxZkW7Caz6y XHfDj24kR0zGGMxv8j/s0RhR5x9ybLDxv76UIS861dad5p6oV78ShBd788NRCDV3 JTVhXHBLPb0= =Xlm6 -----END PGP SIGNATURE-----