CVE-2017-2667

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Last Modified: UTC

Description

It was found that the hammer_cli command line client disables SSL/TLS certificate verification by default. A man-in-the-middle (MITM) attacker could use this flaw to spoof a valid certificate.

It was found that the hammer_cli command line client disables SSL/TLS certificate verification by default. A man-in-the-middle (MITM) attacker could use this flaw to spoof a valid certificate.

Statement

This issue affects the versions of rubygem-hammer_cli as shipped with Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

This issue affects the versions of rubygem-hammer_cli as shipped with Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Additional information

  • Bugzilla 1436262: rubygem-hammer_cli: no verification of API server's SSL certificate
  • CWE-345: Insufficient Verification of Data Authenticity
  • FAQ: Frequently asked questions about CVE-2017-2667

Common Vulnerability Scoring System (CVSS) Score Details

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 v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

6.4

8.1

Attack Vector

Adjacent Network

Network

Attack Complexity

High

High

Privileges Required

None

None

User Interaction

Required

None

Scope

Unchanged

Unchanged

Confidentiality Impact

High

High

Integrity Impact

High

High

Availability Impact

None

High

CVSS v3 Vector

Red Hat: CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

NVD: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Acknowledgements

This issue was discovered by Tomas Strachota (Red Hat).

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

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