CVE-2015-3206
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Description
The CVE Program describes this issue as:
The checkPassword function in python-kerberos does not authenticate the KDC it attempts to communicate with, which allows remote attackers to cause a denial of service (bad response), or have other unspecified impact by performing a man-in-the-middle attack.
Statement
This issue affects the versions of python-kerberos as shipped with Red Hat Enterprise Linux 5, 6, and 7. Red Hat Product Security has rated this issue as having Moderate security impact. Additionally this issue is difficult to exploit in most common scenarios (due to the need for a valid Kerberos TGT)c For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Additional information
- Bugzilla 1223802: python-kerberos: checkPassword() does not verify KDC authenticity
- CWE-304: Missing Critical Step in Authentication
- FAQ: Frequently asked questions about CVE-2015-3206
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).
The following CVSS metrics and score provided are preliminary and subject to review.
| Red Hat | NVD | |
|---|---|---|
CVSS v2 Base Score | 4.3 | 6.8 |
Attack Vector | Network | Network |
Access Complexity | Medium | Medium |
Authentication | None | None |
Confidentiality Impact | Partial | Partial |
Integrity Impact | None | Partial |
Availability Impact | None | Partial |
CVSS v2 Vector
Red Hat: AV:N/AC:M/Au:N/C:P/I:N/A:N
NVD: AV:N/AC:M/Au:N/C:P/I:P/A:P
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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