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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.4016 USN-4168-1: Libidn2 vulnerabilities 30 October 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Libidn2 Publisher: Ubuntu Operating System: Ubuntu UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Provide Misleading Information -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2019-18224 CVE-2019-12290 Original Bulletin: https://usn.ubuntu.com/4168-1/ Comment: This advisory references vulnerabilities in products which run on platforms other than Ubuntu. It is recommended that administrators running Libidn2 check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4168-1: Libidn2 vulnerabilities 29 October 2019 libidn2 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: o Ubuntu 19.04 o Ubuntu 18.04 LTS Summary Several security issues were fixed in Libidn2. Software Description o libidn2 - Internationalized domain names (IDNA2008/TR46) command line tool Details It was discovered that Libidn2 incorrectly handled certain inputs. A attacker could possibly use this issue to impersonate domains. (CVE-2019-12290) It was discovered that Libidn2 incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2019-18224) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04 idn2 - 2.0.5-1ubuntu0.3 libidn2-0 - 2.0.5-1ubuntu0.3 Ubuntu 18.04 LTS idn2 - 2.0.4-1.1ubuntu0.2 libidn2-0 - 2.0.4-1.1ubuntu0.2 To update your system, please follow these instructions: https:// wiki.ubuntu.com/Security/Upgrades . In general, a standard system update will make all the necessary changes. References o CVE-2019-12290 o CVE-2019-18224 - --------------------------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 iQIVAwUBXbkHomaOgq3Tt24GAQhSxA//WWvrQ2SREQoqgoBcETeGgfV98M6FfiNl 745o3m03DXYRBqYiirYYiM95shPdhXTUrh6uvn0Uf1y5+eqCT7VwVwlx0p8O7TN+ JupSVs6D1i32K+xlWVbSUm5fp9GLBXYl5Dl0vkMCsfiyxIkFhpOlaVyZY3bP7/go 7rjI+48RluTp75R/5MuKycdOyrRJtnSXzfeLXBvKljFIf6fSTG/ZnRo8KgWoceHo /JPtRNebtAjWUdsisY23ov1EVIt7pZfom3GBzRgqALGWzxYzF1sfA29YuFJJj87m 5SLbh7qrjZP/0QAQ/6ADgLnzuY0VNPjm9inNeChCsMIG+w4RlvD5eM0fS90dYKow Gx/9SBcQ/Oh+AIn8DQPHIVb40gj4IVAG4egaLIn4u0/mJE5I5mW0BYiGdnIAPlHq CmvRFdu0F7i8xb986ORF9N8fp4J6CaRtTDrYRBQvT0GkH1ZZfGYbQ3KPzc0/7egN AXTq6gF2JzkZtqEre5FED6oZUi41xLrbLa0HiMFGm8sffMNW8SlbvJ9/PHtkfeBG abm4zXsTHpwCsG19Mk+USEplCo/ebo0UlGY0nRYod7X5WGfCAAKbzlHYFwGH9VMw PjlF7DJB7ECXBUxyJjzuAgfq/iPyKovXl7iIPOV/F/kCdZ+8wCCp9/sbjitJAZgY 5W6m7Q3N8S8= =e5Gn -----END PGP SIGNATURE-----