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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0965 USN-4882-1: Ruby vulnerabilities 19 March 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Ruby Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-25613 CVE-2020-10933 CVE-2020-10663 Reference: ESB-2020.4060.2 ESB-2020.3433 ESB-2020.3430.2 ESB-2020.2335 Original Bulletin: https://ubuntu.com/security/notices/USN-4882-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4882-1: Ruby vulnerabilities 18 March 2021 Several security issues were fixed in Ruby. Releases o Ubuntu 20.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS o Ubuntu 16.04 LTS Packages o ruby2.3 - Object-oriented scripting language o ruby2.5 - Object-oriented scripting language o ruby2.7 - Object-oriented scripting language Details It was discovered that the Ruby JSON gem incorrectly handled certain JSON files. If a user or automated system were tricked into parsing a specially crafted JSON file, a remote attacker could use this issue to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. ( CVE-2020-10663 ) It was discovered that Ruby incorrectly handled certain socket memory operations. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. ( CVE-2020-10933 ) It was discovered that Ruby incorrectly handled certain transfer-encoding headers when using Webrick. A remote attacker could possibly use this issue to bypass a reverse proxy. ( CVE-2020-25613 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10 o ruby2.7 - 2.7.1-3ubuntu1.2 o libruby2.7 - 2.7.1-3ubuntu1.2 Ubuntu 20.04 o ruby2.7 - 2.7.0-5ubuntu1.3 o libruby2.7 - 2.7.0-5ubuntu1.3 Ubuntu 18.04 o ruby2.5 - 2.5.1-1ubuntu1.8 o libruby2.5 - 2.5.1-1ubuntu1.8 Ubuntu 16.04 o libruby2.3 - 2.3.1-2~ubuntu16.04.15 o ruby2.3 - 2.3.1-2~ubuntu16.04.15 In general, a standard system update will make all the necessary changes. References o CVE-2020-10663 o CVE-2020-10933 o CVE-2020-25613 - --------------------------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. 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