CVE-2013-4111

Description

From CVE.org

The Python client library for Glance (python-glanceclient) before 0.10.0 does not properly check the preverify_ok value, which prevents the server hostname from being verified with a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate and allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

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 HatNVDcve.org
Base Score55.8N/A
Attack VectorNetworkNetworkN/A
Access ComplexityLowMediumN/A
AuthenticationNoneNoneN/A
Confidentiality ImpactNonePartialN/A
Integrity ImpactPartialPartialN/A
Availability ImpactNoneNoneN/A

Vector

Red Hat: AV:N/AC:L/Au:N/C:N/I:P/A:N

NVD: AV:N/AC:M/Au:N/C:P/I:P/A:N

Understanding the Weakness (CWE)

CWE-295

Integrity,Authentication

Technical Impact: Bypass Protection Mechanism; Gain Privileges or Assume Identity

When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The product might connect to a malicious host while believing it is a trusted host, or the product might be deceived into accepting spoofed data that appears to originate from a trusted host.

Acknowledgements

Red Hat would like to thank OpenStack project for reporting this issue. Upstream acknowledges Thomas Leaman (HP) as the original reporter.

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