CVE-2015-3900
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 they did not include support for getting API endpoint using SRV DNS records.
This issue did not affect the versions of ruby as shipped with Red Hat Enterprise Linux 5 and 6 as they did not include support for getting API endpoint using SRV DNS records. The issue did not affect version of ruby as shipped with Red Hat Enterprise Linux 7, as the support for getting API endpoint using SRV DNS records is included, but inactive.
This issue did not affect the versions of ruby193-ruby as shipped with Red Hat Subscription Asset Manager and Red Hat Software Collections as they did not include support for getting API endpoint using SRV DNS records.
The issue did not affect version of ruby200-ruby as shipped with Red Hat Software Collections, as the support for getting API endpoint using SRV DNS records is included, but inactive.
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).
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.9 | 5 | N/A |
| Attack Vector | Adjacent Network | Network | N/A |
| Access Complexity | Medium | Low | 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:L/Au:N/C:N/I:P/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism; Gain Privileges or Assume Identity
An attacker could utilize the untrusted data source to bypass protection mechanisms and gain access to sensitive data.
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