yahoo-eng-team team mailing list archive

[Jeremy Stanley <fungi@xxxxxxxxxxx>]

Since this report concerns a possible security risk, an incomplete
security advisory task has been added while the core security reviewers
for the affected project or projects confirm the bug and discuss the
scope of any vulnerability along with potential solutions.

I've switched this report from public to public security since it seems
to describe a potential vulnerability.

** Information type changed from Public to Public Security

** Also affects: ossa
   Importance: Undecided
       Status: New

** Changed in: ossa
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1492140

Title:
  consoleauth token displayed in log file

Status in OpenStack Compute (nova):
  New
Status in OpenStack Security Advisory:
  Incomplete

Bug description:
  when instance console is accessed auth token is displayed nova-
  consoleauth.log

  nova-consoleauth.log:874:2015-09-02 14:20:36 29941 INFO nova.consoleauth.manager [req-6bc7c116-5681-43ee-828d-4b8ff9d566d0 fe3cd6b7b56f44c9a0d3f5f2546ad4db 37b377441b174b8ba2deda6a6221e399] Received Token: f8ea537c-b924-4d92-935e-4c22ec90d5f7, {'instance_uuid': u'dd29a899-0076-4978-aa50-8fb752f0c3ed', 'access_url': u'http://192.168.245.9:6080/vnc_auto.html?token=f8ea537c-b924-4d92-935e-4c22ec90d5f7', 'token': u'f8ea537c-b924-4d92-935e-4c22ec90d5f7', 'last_activity_at': 1441203636.387588, 'internal_access_path': None, 'console_type': u'novnc', 'host': u'192.168.245.6', 'port': u'5900'}
  nova-consoleauth.log:881:2015-09-02 14:20:52 29941 INFO nova.consoleauth.manager [req-a29ab7d8-ab26-4ef2-b942-9bb02d5703a0 None None] Checking Token: f8ea537c-b924-4d92-935e-4c22ec90d5f7, True

  and

  nova-novncproxy.log:30:2015-09-02 14:20:52 31927 INFO
  nova.console.websocketproxy [req-a29ab7d8-ab26-4ef2-b942-9bb02d5703a0
  None None]   3: connect info: {u'instance_uuid':
  u'dd29a899-0076-4978-aa50-8fb752f0c3ed', u'internal_access_path':
  None, u'last_activity_at': 1441203636.387588, u'console_type':
  u'novnc', u'host': u'192.168.245.6', u'token': u'f8ea537c-b924-4d92
  -935e-4c22ec90d5f7', u'access_url':
  u'http://192.168.245.9:6080/vnc_auto.html?token=f8ea537c-b924-4d92
  -935e-4c22ec90d5f7', u'port': u'5900'}

  This token has a short lifetime but the exposure still represents a
  potential security weakness, especially as the log record in question
  are INFO level and thus available via centralized logging. A user with
  real time access to these records could mount a denial of service
  attack by accessing the instance console and performing a ctl alt del
  to reboot it

  Alternatively data privacy could be compromised if the attacker were
  able to obtain user credentials

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