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CVE-2015-3900

Publication date 24 June 2015

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record, aka a "DNS hijack attack."

Read the notes from the security team

Status

Package Ubuntu Release Status
jruby 15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty
Not affected
12.04 LTS precise
Not affected
libgems-ruby 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
ruby1.8 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected
ruby1.9.1 15.10 wily Not in release
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected
ruby2.1 15.10 wily
Not affected
15.04 vivid Ignored
14.10 utopic Ignored
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
ruby2.2 15.10 wily
Not affected
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
ruby2.3 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Not in release
rubygems 15.10 wily Not in release
15.04 vivid Not in release
14.10 utopic Not in release
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected

Notes

tyhicks

rubygems is for users of ruby1.8. ruby1.9.1 and jruby ship an embedded rubygems.

seth-arnold

I have doubts this patch actually addresses DNS hijacking adequately; this may properly restrict SRV records, but what verifies subsequent lookups to ensure the returned IPs aren't under attacker control? Marking 'low' as a result.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
ruby2.1
ruby2.2
ruby2.3