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| author | Andrew Jorgensen <ajorgens@amazon.com> | 2016-11-01 10:54:31 -0400 |
|---|---|---|
| committer | Scott Moser <smoser@brickies.net> | 2017-01-20 13:48:08 -0500 |
| commit | b71592ce0e0a9f9f9f225315015ca57b312ad30d (patch) | |
| tree | 785f47c903b57b5b32cc59f69a1eab4431da0d38 /cloudinit/ec2_utils.py | |
| parent | 145410f81c144a46cf5ce0324ff4454fa9f54ad0 (diff) | |
| download | vyos-cloud-init-b71592ce0e0a9f9f9f225315015ca57b312ad30d.tar.gz vyos-cloud-init-b71592ce0e0a9f9f9f225315015ca57b312ad30d.zip | |
EC2: Do not cache security credentials on disk
On EC2, instance metadata can include credentials that remain valid for as
much as 6 hours. Reading these and allowing them to be pickled represents
a potential vulnerability if a snapshot of the disk is taken and shared as
part of an AMI.
This skips security-credentials when walking the meta-data tree.
LP: #1638312
Reviewed-by: Ian Weller <iweller@amazon.com>
Reviewed-by: Ben Cressey <bcressey@amazon.com>
Reported-by: Kyle Barnes <barnesky@amazon.com>
Diffstat (limited to 'cloudinit/ec2_utils.py')
| -rw-r--r-- | cloudinit/ec2_utils.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/cloudinit/ec2_utils.py b/cloudinit/ec2_utils.py index c656ef14..0c16ae47 100644 --- a/cloudinit/ec2_utils.py +++ b/cloudinit/ec2_utils.py @@ -82,6 +82,9 @@ class MetadataMaterializer(object): field_name = get_name(field) if not field or not field_name: continue + # Don't materialize credentials + if field_name == 'security-credentials': + continue if has_children(field): if field_name not in children: children.append(field_name) |