RubyGems up to 2.0.16/2.2.4/2.4.7 Request Handler hostname spoofing : 8/26/2015 3:37:56 AM
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RubyGems up to 2.0.16/2.2.4/2.4.7 Request Handler hostname spoofing
8/24/2015 7:00:00 PM
General
scipID: 77440
Affected: RubyGems up to 2.0.16/2.2.4/2.4.7
Published: 08/25/2015
Risk: critical
Created: 08/26/2015
Entry: 68.9% complete
Summary
A vulnerability has been found in RubyGems up to 2.0.16/2.2.4/2.4.7 and classified as critical. This vulnerability affects an unknown function of the component Request Handler. The manipulation of the argument hostname with an unknown input leads to a spoofing vulnerability. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was published 08/25/2015. This vulnerability was named CVE-2015-4020. The exploitation appears to be difficult. The attack can be initiated remotely. There are known technical details, but no exploit is available.
The vulnerability scanner Nessus provides a plugin with the ID 84248 (Amazon Linux AMI : ruby20 (ALAS-2015-547)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks.
Upgrading to version 2.0.17, 2.2.5 or 2.4.8 eliminates this vulnerability.CVSS
Base Score: 4.6 (CVSS2#AV:N/AC:H/Au:S/C:P/I:P/A:P) [?]
Temp Score: 4.0 (CVSS2#E:ND/RL:OF/RC:ND) [?]
CPE
Exploiting
Class: Spoofing
Local: No
Remote: Yes
Availability: No
Nessus ID: 84248
Nessus Name: Amazon Linux AMI : ruby20 (ALAS-2015-547)
Nessus File: ala_ALAS-2015-547.nasl
Nessus Family: Amazon Linux Local Security Checks
Countermeasures
Recommended: Upgrade
Status: Official fix
0-Day Time: 0 days since found
Upgrade: RubyGems 2.0.17/2.2.5/2.4.8
Timeline
08/25/2015 | Advisory disclosed
08/26/2015 | VulDB entry created
08/26/2015 | VulDB entry updated
Sources
CVE: CVE-2015-4020 (mitre.org) (nvd.nist.org) (cvedetails.com)
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