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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:26792
[Rus]
Version
2
Class
patch
ALTXid
154067
Language
English
Severity
NotAvailable
Title
ALAS-2015-547 -- security update for ruby20
Description
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, 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.
Family
unix
Platform
Amazon Linux AMI
Product
ruby20
Reference
VENDOR: ALAS-2015-547
VENDOR: ALAS-2015-547
Id:
ALAS-2015-547
Reference:
https://alas.aws.amazon.com/ALAS-2015-547.html
CVE: CVE-2015-4020
CVE: CVE-2015-4020
Id:
CVE-2015-4020
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4020
Comment
: RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8 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 with a domain that is suffixed with the original domain name, aka a "DNS hijack attack." NOTE: this vulnerability exists because to an incomplete fix for CVE-2015-3900.
CVSSv2 Score:
4.3
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:N/I:P/A:N
CWE:
20 (Improper Input Validation)
References:
http://blog.rubygems.org/2015/06/08/2.2.5-released.html (CONFIRM)
http://blog.rubygems.org/2015/06/08/2.4.8-released.html (CONFIRM)
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html (CONFIRM)
75431 (BID)
https://github.com/rubygems/rubygems/commit/5c7bfb5 (CONFIRM)
https://puppet.com/security/cve/CVE-2015-3900 (CONFIRM)
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478 (MISC)
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/ (MISC)
CVE: CVE-2015-3900
CVE: CVE-2015-3900
Id:
CVE-2015-3900
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3900
Comment
: 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."
CVSSv2 Score:
5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N
CWE:
254 (Security Features)
References:
http://blog.rubygems.org/2015/05/14/CVE-2015-3900.html (CONFIRM)
FEDORA-2015-12501 (FEDORA)
FEDORA-2015-12574 (FEDORA)
FEDORA-2015-13157 (FEDORA)
RHSA-2015:1657 (REDHAT)
[oss-security] 20150626 rubygems <2.4.8 vulnerable to DNS request hijacking (CVE-2015-3900 and CVE-2015-4020) (MLIST)
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html (CONFIRM)
75482 (BID)
https://puppet.com/security/cve/CVE-2015-3900 (CONFIRM)
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356 (MISC)
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/ (MISC)
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