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Cloud FoundryCFOUNDRY:9BFEEE7CDA0C7EC05BB66A53A89CC49D

HistoryAug 04, 2017 - 12:00 a.m.

USN-3353-1: Heimdal vulnerability | Cloud Foundry

2017-08-0400:00:00

Cloud Foundry

www.cloudfoundry.org

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.1

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.047

Percentile

92.7%

JSON

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

Canonical Ubuntu 14.04

Description

Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered that Heimdal clients incorrectly trusted unauthenticated portions of Kerberos tickets. A remote attacker could use this to impersonate trusted network services or perform other attacks.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

Cloud Foundry BOSH stemcells are vulnerable, including:
- 3312.x versions prior to 3312.32
- 3363.x versions prior to 3363.29
- 3421.x versions prior to 3421.18
- All other stemcells not listed.
All versions of Cloud Foundry cflinuxfs2 prior to 1.138.0

Mitigation

OSS users are strongly encouraged to follow one of the mitigations below:

The Cloud Foundry project recommends upgrading the following BOSH stemcells:
- Upgrade 3312.x versions prior to 3312.32
- Upgrade 3363.x versions prior to 3363.29
- Upgrade 3421.x versions prior to 3421.18
- All other stemcells should be upgraded to the latest version available on bosh.io.
The Cloud Foundry project recommends that Cloud Foundry deployments run with cflinuxfs2 version 1.138.0 or later.