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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3443 USN-4565-1: OpenConnect vulnerability 6 October 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: OpenConnect Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-16239 Reference: ESB-2020.0214 Original Bulletin: https://usn.ubuntu.com/4565-1/ - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4565-1: OpenConnect vulnerability 05 October 2020 OpenConnect could be made to crash if it received specially crafted input. Releases o Ubuntu 18.04 LTS Packages o openconnect - An SSL VPN client Details It was discovered that OpenConnect has a buffer overflow when a malicious server uses HTTP chunked encoding with crafted chunk sizes. An attacker could use it to provoke a denial of service (crash). Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 o libopenconnect5 - 7.08-3ubuntu0.18.04.2 o openconnect - 7.08-3ubuntu0.18.04.2 In general, a standard system update will make all the necessary changes. References o CVE-2019-16239 - --------------------------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 iQIVAwUBX3vPCONLKJtyKPYoAQjb8A/9EkQUFq6UM8grhFvanDQ8yAZNA+Dcb0GG Rg7wz3D21TiLk/MbLNclErkFV5mb+eRctU8G1sw7G4fUKcjqJpHLVL6+6l1DfMNg gW+4SVN94d3MOvYk8C3WkI5wZiKVzlEXkRZseB5rLZQBiGX/YoBTb4KDggO0xMGi 8S6rKPEr6dsO4DXxfLBncTDMKUK0dDHH+WSC7q3Ix2sbt+ZcrgBmDUxLGTNwDmDY Sfubfc/TwVI+qEJohfFdMTHc3oxk5NcC9dehvP0143MNqqb8QKD3dXZOH9WxAvbs UdjkFk7xTUnBDamEscPYfDFGDLWaF2euiegEVR6FLMnbPYEFp8PB2h2j07CcLc9E ORQc5GN/EMri+/vpZPpHOesCr4ioLlJRBY1Gosm/cIFVAbSOEl0e7rYiQ+rqbMZD LP5RiOFqnj8ajTumK09QUgAE1LVROcXSjek/wdNHu7exW6veB1/xayy/sOQ3JuT6 IAWPsmYDCyHYEVsbccw8w/RaTrVn/TbhIjgZAXJm8ZahZs8W521VFAizlezEKU1i hibd9rNJPPArINtx6BBV1oIhV1TXu0AFvZsEL3HZxFYWWSHSEWLCIAA7sXygu2zU FrjnlMmIGzIEUG6YgiDDXJMkQ9gcPpkq7k881v01fN1fZDx2zkeFU25Ps1I0wycI nM8Lb9ghtJQ= =FNtB -----END PGP SIGNATURE-----