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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1346 USN-4563-2: NTP vulnerability 21 April 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: NTP Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-8936 CVE-2018-7182 Reference: ESB-2021.1255 ESB-2020.3427 Original Bulletin: https://ubuntu.com/security/notices/USN-4563-2 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4563-2: NTP vulnerability 20 April 2021 NTP could be made to crash. Releases o Ubuntu 20.10 o Ubuntu 20.04 LTS Packages o ntp - Network Time Protocol daemon and utility programs Details USN-4563-1 fixed a vulnerability in NTP. This update provides the corresponding update for Ubuntu 20.04 LTS and Ubuntu 20.10. Original advisory details: It was discovered that the fix for CVE-2018-7182 introduced a NULL pointer dereference into NTP. An attacker could use this vulnerability to cause a denial of service (crash). Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10 o ntp - 1:4.2.8p12+dfsg-3ubuntu4.20.10.1 o sntp - 1:4.2.8p12+dfsg-3ubuntu4.20.10.1 o ntpdate - 1:4.2.8p12+dfsg-3ubuntu4.20.10.1 Ubuntu 20.04 o ntp - 1:4.2.8p12+dfsg-3ubuntu4.20.04.1 o sntp - 1:4.2.8p12+dfsg-3ubuntu4.20.04.1 o ntpdate - 1:4.2.8p12+dfsg-3ubuntu4.20.04.1 In general, a standard system update will make all the necessary changes. References o CVE-2019-8936 Related notices o USN-4563-1 : ntp, ntpdate, sntp - --------------------------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 iQIVAwUBYH9+AONLKJtyKPYoAQjdkQ/+P3L3ZdSjB7h4WgI1QvVhskXuCr+obTCt lBik+KqnPCjnnOFQYf4snL9Mumd1IeQNey+V8IltiQUkYO3RKo7kwrNCOwBnixkb R3Jvw2p35qnC89jfIo1yFJedw0/uNIratdDJIP1rwFOxEmyC0FHzAwzI/+DyC/QG Yab9p6xrLYmV6bohg+W/9cJYbcD8vO8zJbgo4JpZaLQPzOw85L3ZnFqr7oh48Oft Kze2KKdFfSPS9RF1oTZSnDcCyrkEOFxNuz1sj+P41Zim3hT9zZLCB/FrkM7DLMhB 1npbiG4u4JJhZAP4v3cbXzxOyKFY7VHa7y9rGDTCpP0ZHF7qpgiz202tZk2onH9Y gs+vJysgHx41CPUG4CeznVRLmCTt2IkTnKeg+0FZhAvqs0+qChTDIhI5PG7OfWwW jQ3FSI9tEjXfmsgkJfAsbuMznx21MB5UtPXqwP/gWyhhjCrHtDYbaJ6494x9sCHv RFDsj7KkWNEX6Rcg2UiN893WYPY2bRIHzhMLXmddugT4G24ygVI4tA1P5z83C8+m 18PTqJjMs/6zOnnY9lAjA7JJKWT+rFpyroCih7+O4BFL2GK6JZnjnszQJ/QUqfUl 2LNrwf9318kA8ChuyWD6laMn9ndlZY/DxlI5JEZfHGuCkD+Dq2mw34tJ+hBOm/CG +DctChfUcmI= =T4zg -----END PGP SIGNATURE-----