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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2075 USN-4397-1: NSS vulnerabilities 17 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: NSS Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Denial of Service -- Remote with User Interaction Access Confidential Data -- Existing Account Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2020-12399 CVE-2019-17023 Reference: ESB-2020.2058 ESB-2020.2049 ESB-2020.0107.2 ESB-2020.0054 Original Bulletin: https://usn.ubuntu.com/4397-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4397-1: NSS vulnerabilities 16 June 2020 nss vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 20.04 LTS o Ubuntu 19.10 o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Summary Several security issues were fixed in NSS. Software Description o nss - Network Security Service library Details It was discovered that NSS incorrectly handled the TLS State Machine. A remote attacker could possibly use this issue to cause NSS to hang, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.10. (CVE-2019-17023) Cesar Pereida Garcia discovered that NSS incorrectly handled DSA key generation. A local attacker could possibly use this issue to perform a timing attack and recover DSA keys. (CVE-2020-12399) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS libnss3 - 2:3.49.1-1ubuntu1.1 Ubuntu 19.10 libnss3 - 2:3.45-1ubuntu2.3 Ubuntu 18.04 LTS libnss3 - 2:3.35-2ubuntu2.8 Ubuntu 16.04 LTS libnss3 - 2:3.28.4-0ubuntu0.16.04.11 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . After a standard system update you need to reboot your computer to make all the necessary changes. References o CVE-2019-17023 o CVE-2020-12399 - --------------------------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. 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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 iQIVAwUBXulbeeNLKJtyKPYoAQhylw/9GIJ0jV6JKYsVgcPLlK/G1J871RIMW+6D slwrIwlXa2Ld3AqDcDdSKoCq63LhWlI2y7IvmtkxjP79b4Tp0kBMjhexpXeGgWyV hYYIDREA9lCW0IfxKe2hdEyoUh37RB79RoQFc7Z8Q/nSl5AvQCfTNSkTVZgqx2Bw 8+lcyYPehsE5N4TvdHAAXA3jucnBUac+gXaEkQMfbkdSdI7jmA/ugWXJ7vJHaqAo +BLHXgLWyqaJ2V/E9/a74qJxTfzUz3vVP4xgkYcT0tmEW8uGeIxvt8ql3ZTS0Dv3 GVNcpIkepDWJRnrm0bYH1zWAA987/YkOKTE85mAj2Q6Lwai7paHxeF1kDxhT4oLs oMr/Xd9rs5PoRENUgZqZwO/ZpGsboXmMEq/ha/wraWG6z0a4edYJyrpwe7Ogm2FP 7LaSQFmrlffp22jOW6ii9ntEOPGur+FsZgOdrofNuskCP+aQqXyrgRyv5kCQbd3S 5gifvcTqho4dwOHVPPMHKda/ADJ+ShMP4tRbhnQf6bnLnlfQsgZzzfWl4U3fv5LJ 9gI2PKnePK5HbHcJEf5e/y1NjJrxJyvMVaXTTq26DUfzx2EulySxly5eNAAlCose wZXPt3s92Jvfqf2INOboAw0fRBF25A/ltAdY4mRUm1DWRCOjZ6kzGwsRGqDjqwu0 3rlNXJmUzGQ= =kB1c -----END PGP SIGNATURE-----