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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3295 USN-4540-1: atftpd vulnerabilities 25 September 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: atftpd 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-2019-11366 CVE-2019-11365 Reference: ESB-2019.1655 ESB-2019.1602 ESB-2019.1456 Original Bulletin: https://usn.ubuntu.com/4540-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4540-1: atftpd vulnerabilities 24 September 2020 Several security issues were fixed in atftpd. Releases o Ubuntu 18.04 LTS Packages o atftp - Advanced TFTP Server and Client Details Denis Andzakovic discovered that atftpd incorrectly handled certain malformed packets. A remote attacker could send a specially crafted packet to cause atftpd to crash, resulting in a denial of service. (CVE-2019-11365) Denis Andzakovic discovered that atftpd did not properly lock the thread list mutex. An attacker could send a large number of tftpd packets simultaneously when running atftpd in daemon mode to cause atftpd to crash, resulting in a denial of service. (CVE-2019-11366) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 o atftpd - 0.7.git20120829-3.1~0.18.04.1 In general, a standard system update will make all the necessary changes. References o CVE-2019-11365 o CVE-2019-11366 - --------------------------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 iQIVAwUBX21KAeNLKJtyKPYoAQhIzA//X2TlNOcsp13FIZ+ESq9b9k0bFduAc8TQ iVRKEYdVCu7q5xocmgkpASyK/MsKGyhCP061FEY5lTUy4s6MqDhUGgEi8tI6KJV7 +lXDMl639p87/cAOSTX3+SmaO36UIsOaqrxFywXMawRZBvZvYFp1vxgCpspNToA8 bz2itmKk09MtodIZX4N77v6wUnr8ZOudQLxyABgdb9NLGRRCuuIyc0UcUKIMGu5s Lp0XC4vRezUVGE7B9jZEavivprmQtyKr8dxCUNeg+qjnq6wWMyayHrsLw30pMMmq NHp21lPCfWWZDIheBwQTqKjkOMwl6k9P+Pbb35y5shHTuVG+DSkCR+ov7GFnM2uh 7tpTo8G8Jndynk9lQrr7TqjXoPtbn3WhRcpYxkskS0M38cnnZTMniu0rZUtT9CCK tgjh9c/YPymBZaMdjBzC5SfUn0QuSLKomema8XZBtyxf5WyUlBdWXtQaHo9vCbGB UaTOyWj7dt2Hw7pVARYie7aj3L3q/dVQS9wERGybyfi/oMj2dvVZD7TTGpyIWcAM 4d17psfemAbpaSfQVHWCGhQyMLS71fOJY4p8vFEXYIfOOm1y0YvLfmljJPQybusr tjDdwJBS7afRbwwJtWBZyDLApyZXCAqgM9JBPqwj3v/KpLm8Xia8sSAgBXYtzcPe bvOnrcjLSiU= =6imz -----END PGP SIGNATURE-----