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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3103 USN-4491-1: GnuTLS vulnerability 10 September 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: GnuTLS Publisher: Ubuntu Operating System: Ubuntu UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-24659 Original Bulletin: https://usn.ubuntu.com/4491-1/ Comment: This advisory references vulnerabilities in products which run on platforms other than Ubuntu. It is recommended that administrators running GnuTLS check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4491-1: GnuTLS vulnerability 09 September 2020 GnuTLS could be made to crash or run programs if it received specially crafted network traffic. Releases o Ubuntu 20.04 LTS Packages o gnutls28 - GNU TLS library Details It was discovered that GnuTLS incorrectly handled certain alerts when being used with TLS 1.3 servers. A remote attacker could use this issue to cause GnuTLS 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 20.04 o libgnutls30 - 3.6.13-2ubuntu1.3 In general, a standard system update will make all the necessary changes. References o CVE-2020-24659 - --------------------------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 iQIVAwUBX1mnWONLKJtyKPYoAQj90BAAkwFoiwNdxsiztb2d5Va0VCxTMMTP+kVl /iDNKZm5FYdS1H2dO6Sm0lGKQ+aqwemKnpKnes/6kabSyDEdpMo+tszktdL93zIK bELz3qgCr4gMA966fQLbf0/W2651HNgOLmEHp+23bRAnFeECx6yGHlgRp/m44UDX B3ywRMhxj7bDIW/XZi2lREOt0XiyZ1oD6ZDLTs+4vDA6teC2NH85UTS+RTBCxAL3 RkLjn2+6xM2ve+3QAJnTN822ali0J6W8oCX+IM8eNPzhBPnr8DbRojsI9VvDycxC gYsQe38Ey+14SPFgX83yW7TEXXpqrJfBqwHGInOQQn4q3cgxjH5cojz0zn2s2Gzh gy2to8QPjuYrdL7zSvFmvvw4AOIruYjy0vV7vk5mpo8KVTo56fGVEJOuiGiunNEA N15oM4BetHEg7atxCizIg3bshYQkeylNwktEvp7ne/YbzK+P/NoLBmJOxrP4xmtF 8IdsEh/wAltCJ3vlyvp3LKkbXlNwQr36Ij6zRh98+3N6VzCezEZ5r+k+314joBNe DEE9ZdcCJ5TC4pF1S3sCjU33O2pkJISXq9HoSBaFQMTXLuMYKDk8+tnzRSjpAIyZ e617/eBm3I5buPiSBvpoft9FtC0NgjmmLR70OKQkjbVMnLA5PtyVqm40/Qj5RKwR SbH1Cypohg0= =QoLu -----END PGP SIGNATURE-----