5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
0.008 Low
EPSS
Percentile
82.0%
Issue Overview:
RubyGems provides the ability of a domain to direct clients to a separate host that is used to fetch gems and make API calls against. This mechanism is implemented via DNS, specificly a SRV record _rubygems._tcp under the original requested domain. RubyGems did not validate the hostname returned in the SRV record before sending requests to it. (CVE-2015-3900)
As discussed upstream (https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478), CVE-2015-4020 is due to an incomplete fix for CVE-2015-3900, which allowed redirection to an arbitrary gem server in any security domain.
Affected Packages:
ruby20
Issue Correction:
Run yum update ruby20 to update your system.
New Packages:
i686:
ruby20-2.0.0.645-1.27.amzn1.i686
ruby20-devel-2.0.0.645-1.27.amzn1.i686
ruby20-debuginfo-2.0.0.645-1.27.amzn1.i686
rubygem20-io-console-0.4.2-1.27.amzn1.i686
rubygem20-bigdecimal-1.2.0-1.27.amzn1.i686
ruby20-libs-2.0.0.645-1.27.amzn1.i686
rubygem20-psych-2.0.0-1.27.amzn1.i686
noarch:
rubygems20-devel-2.0.14-1.27.amzn1.noarch
rubygems20-2.0.14-1.27.amzn1.noarch
ruby20-irb-2.0.0.645-1.27.amzn1.noarch
ruby20-doc-2.0.0.645-1.27.amzn1.noarch
src:
ruby20-2.0.0.645-1.27.amzn1.src
x86_64:
ruby20-debuginfo-2.0.0.645-1.27.amzn1.x86_64
rubygem20-psych-2.0.0-1.27.amzn1.x86_64
ruby20-libs-2.0.0.645-1.27.amzn1.x86_64
ruby20-devel-2.0.0.645-1.27.amzn1.x86_64
ruby20-2.0.0.645-1.27.amzn1.x86_64
rubygem20-bigdecimal-1.2.0-1.27.amzn1.x86_64
rubygem20-io-console-0.4.2-1.27.amzn1.x86_64
Red Hat: CVE-2015-3900, CVE-2015-4020
Mitre: CVE-2015-3900, CVE-2015-4020
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 1 | i686 | ruby20 | < 2.0.0.645-1.27.amzn1 | ruby20-2.0.0.645-1.27.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | ruby20-devel | < 2.0.0.645-1.27.amzn1 | ruby20-devel-2.0.0.645-1.27.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | ruby20-debuginfo | < 2.0.0.645-1.27.amzn1 | ruby20-debuginfo-2.0.0.645-1.27.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | rubygem20-io-console | < 0.4.2-1.27.amzn1 | rubygem20-io-console-0.4.2-1.27.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | rubygem20-bigdecimal | < 1.2.0-1.27.amzn1 | rubygem20-bigdecimal-1.2.0-1.27.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | ruby20-libs | < 2.0.0.645-1.27.amzn1 | ruby20-libs-2.0.0.645-1.27.amzn1.i686.rpm |
Amazon Linux | 1 | i686 | rubygem20-psych | < 2.0.0-1.27.amzn1 | rubygem20-psych-2.0.0-1.27.amzn1.i686.rpm |
Amazon Linux | 1 | noarch | rubygems20-devel | < 2.0.14-1.27.amzn1 | rubygems20-devel-2.0.14-1.27.amzn1.noarch.rpm |
Amazon Linux | 1 | noarch | rubygems20 | < 2.0.14-1.27.amzn1 | rubygems20-2.0.14-1.27.amzn1.noarch.rpm |
Amazon Linux | 1 | noarch | ruby20-irb | < 2.0.0.645-1.27.amzn1 | ruby20-irb-2.0.0.645-1.27.amzn1.noarch.rpm |