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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2017.0137 Multiple vulnerabilities in RubyGems 31 August 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: RubyGems Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Overwrite Arbitrary Files -- Remote with User Interaction Denial of Service -- Existing Account Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2017-0902 CVE-2017-0901 CVE-2017-0900 CVE-2017-0899 Member content until: Saturday, September 30 2017 OVERVIEW Multiple vulnerabilities have been identified in Ruby prior to versions 2.28, 2.3.5, 2.4.2 and Trunk revision 59673 [1] IMPACT The vendor has provided the following details regarding the issues: "a DNS request hijacking vulnerability. (CVE-2017-0902) an ANSI escape sequence vulnerability. (CVE-2017-0899) a DoS vulnerability in the query command. (CVE-2017-0900) a vulnerability in the gem installer that allowed a malicious gem to overwrite arbitrary files. (CVE-2017-0901) It is strongly recommended for Ruby users to take one of the following workarounds as soon as possible. Affected Versions Ruby 2.2 series: 2.2.7 and earlier Ruby 2.3 series: 2.3.4 and earlier Ruby 2.4 series: 2.4.1 and earlier prior to trunk revision 59672" [1] MITIGATION "At this moment, there are no Ruby releases including the fix for RubyGems. But you can upgrade RubyGems to the latest version. RubyGems 2.6.13 or later includes the fix for the vulnerabilities." [1] REFERENCES [1] Multiple vulnerabilities in RubyGems https://www.ruby-lang.org/en/news/2017/08/29/multiple-vulnerabilities-in-rubygems/ AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. 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. =========================================================================== 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 iQIVAwUBWaegLox+lLeg9Ub1AQguSg/+Oy0D42Lwt5ucPjndmicgaudUcYBHUKF+ RRtaXhrhzfREocBPRC+dsDvJauE8TaZxTIEaN4a3AXd0ViJ6nU2dx1ZW1kg2uJ0Q NYXD4mYbImsk6NcOLA2jvBtjoj8usAOHh7kOJfRbOY7YVvsC/69b8QehXkFdfdn9 MeltN+2qK4aGADNVKO6ZGSLQHD0dNVsS7U3h96btRwAM7Rss7CDsCab6ouwZt/lY Udfvl9i1rpzDKEmMxzCpUdLAtP9Vi3bQjW7IJ+GJETpbh2h/MYD6kgb/Vik5MOAu ESs2zqnqpCYJsfWqrR5BLEwsehkKdLJuLnZ8o/XFrLJ0yR6Qu8t97EApEOVl/ddm P3v0MLEauipgoLiDBRx8+vODZcOngFGeMZ/zCrz1fG5fMQs80tXebd5eIZ7j0FgZ Ntgf5RdvaKqXuLKm0HaqTE3T90kJcq2554VNy695uJJGJsFSAO4f6tSCJUne1v4k HIBvDmuTNcaetYrHQ6/wxPjxIMF8oWiYttVeSZs65B6VnwTSp8mBpkfKgW2TIqX3 jvo+KqT7GtCPkvloxeVPvfu4hKDBHgvkKjxxYcZN+WTZKUov/rt1DgWasuX5w8ZT kGe0JJuZ8+v4iTegOeFMFpoPcUJoy5WZltOmDjXP/AVIQeI/0dtOTy2SB68Cmgtj HcMHAf5fp/w= =HDVO -----END PGP SIGNATURE-----