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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.4062 USN-5168-2: Thunderbird vulnerability 2 December 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Thunderbird Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Reduced Security -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-43527 Reference: ESB-2021.4061 Original Bulletin: https://ubuntu.com/security/notices/USN-5168-2 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-5168-2: Thunderbird vulnerability 01 December 2021 Thunderbird could be made to crash or run programs if it verified a specially crafted signature. Releases o Ubuntu 21.10 o Ubuntu 21.04 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o thunderbird - Mozilla Open Source mail and newsgroup client Details Tavis Ormandy discovered that NSS, included with Thunderbird, incorrectly handled verifying DSA/RSA-PSS signatures. A remote attacker could use this issue to cause Thunderbird to crash, resulting in a denial of service, 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 thunderbird - 1:91.3.1+build1-0ubuntu0.21.10.2 Ubuntu 21.04 o thunderbird - 1:78.14.0+build1-0ubuntu0.21.04.2 Ubuntu 20.04 o thunderbird - 1:78.14.0+build1-0ubuntu0.20.04.2 Ubuntu 18.04 o thunderbird - 1:78.14.0+build1-0ubuntu0.18.04.2 After a standard system update you need to restart Thunderbird to make all the necessary changes. References o CVE-2021-43527 Related notices o USN-5168-1 : nss, libnss3, libnss3-dev, libnss3-tools o USN-5168-3 : nss, libnss3-nssdb, libnss3-dev, libnss3-1d, libnss3, libnss3-tools - --------------------------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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYaf1xONLKJtyKPYoAQjflxAAikky+t10/O9WWgvtX5Z36J8SneqoQ+O+ z+/HcPNUwwz4vbvNWyiDA6ZdQVtH6H0sU353fN/TQlQpV8ysLQ6XfzmttfU8rhb0 E4j9b3WViPNmXWzeW4/uxHccgWIVup6o3mw7wxvLq7yAivvOjdRdxqV4ybVHSqdV oNo6AWj/ShR7ZNni1fbjbmkl4Pz94llvNzWZpJwfcGk7EMu87NNq83VUHeb/UCsI jJJVohiENxoqwFLxyZmdFphJ10lzS07DQUfiyrF345kRcglq/5knOMAiSUJuGdJK LlyLQaDwA1ImMpv9RYVN6GpPlzbgfv8vd1X8MAZsMpnAc+lryjuHxI4QJE5yerHf JvP77wQLAbnhxiYGR+SYddR6/6+5W9QIJlw4gwgL+h/VdjFXVl/7zF9+v3H5F29I 8DqmlKahJB8qkgn1EGmnMmetDWtKXtuuwQT0IvbfFfWhKjorhdFQyeodiXpHuMNp qBmK/IG8KvzRVrsLjcgfdRktwpPDUFkH43rmhVAhuTHADmrbjx1gdoEv/itZ85Km mMX8Kiut+6xESFvWt3pC0e83jFTOYX8/uyUGzy7VzlcFCJoTomSSNKSwQliJ9HBI jh8nBdH/K4aapV30C84yCr8LWv0e1iL5duMXbrSuSJXaNXa5ahg9iV+NLlolmFha AjQU29f0DeQ= =HlXl -----END PGP SIGNATURE-----