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Test ID:1.3.6.1.4.1.25623.1.0.120440
Category:Amazon Linux Local Security Checks
Title:Amazon Linux: Security Advisory (ALAS-2015-549)
Summary:The remote host is missing an update for the 'ruby22' package(s) announced via the ALAS-2015-549 advisory.
Description:Summary:
The remote host is missing an update for the 'ruby22' package(s) announced via the ALAS-2015-549 advisory.

Vulnerability Insight:
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, specifically 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, 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 Software/OS:
'ruby22' package(s) on Amazon Linux.

Solution:
Please install the updated package(s).

CVSS Score:
5.0

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2015-3900
BugTraq ID: 75482
http://www.securityfocus.com/bid/75482
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163502.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163600.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164236.html
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/
http://www.openwall.com/lists/oss-security/2015/06/26/2
RedHat Security Advisories: RHSA-2015:1657
http://rhn.redhat.com/errata/RHSA-2015-1657.html
Common Vulnerability Exposure (CVE) ID: CVE-2015-4020
BugTraq ID: 75431
http://www.securityfocus.com/bid/75431
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478
CopyrightCopyright (C) 2015 Greenbone AG

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