ESB-2019.0647 - [SUSE] caasp-container-manifests, changelog-generator-data-sles12sp3-velum, kubernetes-salt, rubygem-aes_key_wrap, rubygem-json-jwt, sles12sp3-velum-imag and velum: Unauthorised access - Remote/unauthenticated 2019-03-04

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0647
    SUSE-SU-2019:0537-1 Security update for caasp-container-manifests,
        changelog-generator-data-sles12sp3-velum, kubernetes-salt,
   rubygem-aes_key_wrap, rubygem-json-jwt, sles12sp3-velum-image, velum
                               4 March 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           caasp-container-manifests
                   changelog-generator-data-sles12sp3-velum
                   kubernetes-salt
                   rubygem-aes_key_wrap
                   rubygem-json-jwt
                   sles12sp3-velum-image
                   velum
Publisher:         SUSE
Operating System:  SUSE
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-1000539  

Reference:         ESB-2018.2602

Original Bulletin: 
   https://www.suse.com/support/update/announcement/2019/suse-su-20190537-1.html

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SUSE Security Update: Security update for caasp-container-manifests, 
changelog-generator-data-sles12sp3-velum, kubernetes-salt, rubygem-aes_key_wrap, 
rubygem-json-jwt, sles12sp3-velum-image, velum 

______________________________________________________________________________
Announcement ID:   SUSE-SU-2019:0537-1
Rating:            important
References:        #1121145 #1121162 #1121165 #1121166
Cross-References:  CVE-2018-1000539
Affected Products:
                   SUSE CaaS Platform 3.0
______________________________________________________________________________

An update that solves one vulnerability and has three fixes is now available.

Description:


This update for caasp-container-manifests,
changelog-generator-data-sles12sp3-velum, kubernetes-salt,
rubygem-aes_key_wrap, rubygem-json-jwt, sles12sp3-velum-image, velum provides
the following fixes:
Security issue fixed in rubygem-json-jwt and velum:

  o CVE-2018-1000539: Fixed an improper verification of cryptographic
    signatures during the decryption of encrypted with AES-GCM JSON Web Tokens
    which could lead to a forged authentication tag. (bsc#1099243, bsc#1121166)


caasp-container-manifests:

  o Disable the kubelet servers on the admin node. The admin node is not part
    of a k8s cluster, so enabling the endpoints for interaction by the user/
    api-server is not needed. Instead (only on the admin node) all endpoints
    (healthz and server) that are usually exposed by the kubelet are disabled.
    (bsc#1121145)


kubernetes-salt:

  o haproxy: Block requests to /internal-api endpoint. The internal api
    endpoints expose sensitive data and thus should not be accessed via
    internet. This internal api was developed inside the velum project and
    haproxy was allowing requests to that endpoint. Velum listens on 0.0.0.0
    and needs to block for that specific path. With this change any request to
    anything that starts with /internal-api is blocked. (bsc#1121162)


velum:

  o Changed kubeconfig download from get to post request. The kubeconfig
    download request was previously done via GET request and the file content
    could be easily modified through url parameters. Changing from GET to POST
    method takes advantage of CSRF protection. (bsc#1121165)

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation
methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  o SUSE CaaS Platform 3.0:
    To install this update, use the SUSE CaaS Platform Velum dashboard. It will
    inform you if it detects new updates and let you then trigger updating of
    the complete cluster in a controlled way.

Package List:

  o SUSE CaaS Platform 3.0 (x86_64):
       sles12-velum-image-3.1.10-3.36.3
  o SUSE CaaS Platform 3.0 (noarch):
       caasp-container-manifests-3.0.0+git_r297_c3bfc41-3.9.1
       kubernetes-salt-3.0.0+git_r935_34ce12d-3.50.1


References:

  o https://www.suse.com/security/cve/CVE-2018-1000539.html
  o https://bugzilla.suse.com/1121145
  o https://bugzilla.suse.com/1121162
  o https://bugzilla.suse.com/1121165
  o https://bugzilla.suse.com/1121166

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