01 February 2018
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.0314 Ruby vulnerabilities 1 February 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Ruby Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Overwrite Arbitrary Files -- Remote with User Interaction Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2017-0903 CVE-2017-0902 CVE-2017-0901 Reference: ASB-2017.0137 ESB-2017.2520 ESB-2017.2224 Original Bulletin: http://www.ubuntu.com/usn/usn-3553-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-3553-1: Ruby vulnerabilities Ubuntu Security Notice USN-3553-1 31st January, 2018 ruby2.3 vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 17.10 Ubuntu 16.04 LTS Summary Several security issues were fixed in Ruby. Software description ruby2.3 - Interpreter of object-oriented scripting language Ruby Details It was discovered that Ruby failed to validate specification names. An attacker could possibly use a maliciously crafted gem to potentially overwrite any file on the filesystem. (CVE-2017-0901) It was discovered that Ruby was vulnerable to a DNS hijacking vulnerability. An attacker could use this to possibly force the RubyGems client to download and install gems from a server that the attacker controls. (CVE-2017-0902) It was discovered that Ruby incorrectly handled certain YAML files. An attacker could use this to possibly execute arbitrary code. (CVE-2017-0903) Update instructions The problem can be corrected by updating your system to the following package version: Ubuntu 17.10: libruby2.3 2.3.3-1ubuntu1.3 ruby2.3 2.3.3-1ubuntu1.3 Ubuntu 16.04 LTS: libruby2.3 2.3.1-2~16.04.6 ruby2.3 2.3.1-2~16.04.6 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 CVE-2017-0901, CVE-2017-0902, CVE-2017-0903 - --------------------------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 firstname.lastname@example.org and we will forward your request to the appropriate person. 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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: email@example.com 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 iQIVAwUBWnJeMox+lLeg9Ub1AQhdqg/+KBPbvqFdTqDKXgwLsWQAUCtTZkHmhNj/ a+u8uAaPBVS3lo8GW1vTSt0gXrwRs1bpEEGUcd7GwrY3GfcJc/08l7oiit7K/eqx SEGACzhfgrnZOvRtDb2zDZEeM90QTr/avvtBS0LV19vfTSmh++g3W67rrHzsCVeT 4RBhPntRodSPj3GF2ZCqEOi3mNLxuJ+TUr50cxkvtY/eoauVhJLLRIYgwvqt1d4d iMDDAaumKfpVcFBEx2qR647yYMxiclnb0Afr+X6l2ltsS69MJGIPcq8L92pMTrim 32SOmU85WazVuoOan8QcDmWzNULiZuQaUq9QjCoXc4ikuh+MzviNKp7ZxyVWYdNY p+fsofsMCK+7kzyFssmicZnDVtgZNV9ocFJ5uOUEt7Vb+1X7F5QtAoQ3Wv3oTw7t uzDwGYtvq3VxKtOn87ZzFExY//5Xi59JQ8ntSfgObifPotcmKWI2gTD489lXW7Qk 3Ne9ubjLuRXhkbp889Hluud6y58KjzHE0RDbDmxTG4ZlMA5lxWlYsanzStq664zp 5oDrTpYbb6D39jXphuhGrlBhVhXONrvnTB7FWJg+vmCzB3nZ5vP9Fb9Gb1YZk3V1 hLrejWOami3Pu2YaUOo11Kqf2vReJJPDkONE7U/YJ2dp0F62mnlwFP+CmSeYG6+v niCBOYtsQG4= =kKmi -----END PGP SIGNATURE-----