A vulnerability was found where rubygems did not sanitize DNS responses when requesting the hostname of the rubygems server for a domain, via a _rubygems._tcp DNS SRV query. An attacker with the ability to manipulate DNS responses could direct the gem command towards a different domain.
Find out more about CVE-2017-0902 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of ruby as shipped with Red Hat Enterprise Linux 6, and 7 and the versions of rh-ruby22-ruby and rh-ruby23-ruby as shipped with Red Hat Software Collections. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
| CVSS3 Base Score | 7.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-ruby23-ruby) | RHSA-2018:0585 | 2018-03-26 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-ruby22-ruby) | RHSA-2018:0583 | 2018-03-26 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-ruby22-ruby) | RHSA-2018:0583 | 2018-03-26 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-ruby24-ruby) | RHSA-2017:3485 | 2017-12-19 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-ruby24-ruby) | RHSA-2017:3485 | 2017-12-19 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-ruby23-ruby) | RHSA-2018:0585 | 2018-03-26 |
| Red Hat Enterprise Linux 7 (ruby) | RHSA-2018:0378 | 2018-02-28 |
| Platform | Package | State |
|---|---|---|
| Red Hat Subscription Asset Manager 1 | ruby193-rubygems | Will not fix |
| Red Hat Satellite 6 | rubygems | Will not fix |
| Red Hat Enterprise MRG 2 | rubygems | Will not fix |
| Red Hat Enterprise Linux 6 | rubygems | Will not fix |
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