CVE-2015-4020
Description
A flaw was found in a way rubygems verified the API endpoint hostname retrieved through a DNS SRV record. A man-in-the-middle attacker could use this flaw to force a client to download content from an untrusted domain.
Statement
This issue did not affect the versions of rubygems as shipped with Red Hat Enterprise Linux 6, Red Hat Enterprise MRG 2.5, Red Hat Satellite 6, Red Hat Openstack 5, Red Hat Openshift Enterprise 2, as the packages did not include the incomplete fix.
This issue did not affect the versions of ruby as shipped with Red Hat Enterprise Linux 5, 6 and 7, Red Hat Subscription Asset Manager and Red Hat Software Collections, as the packages did not include the incomplete fix.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.9 | 4.3 | N/A |
| Attack Vector | Adjacent Network | Network | N/A |
| Access Complexity | Medium | Medium | N/A |
| Authentication | None | None | N/A |
| Confidentiality Impact | Complete | None | N/A |
| Integrity Impact | Complete | Partial | N/A |
| Availability Impact | Complete | None | N/A |
Vector
Red Hat: AV:A/AC:M/Au:N/C:C/I:C/A:C
NVD: AV:N/AC:M/Au:N/C:N/I:P/A:N
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