*** This bug is a security vulnerability ***
Public security bug reported:
Glance populates a legacy 'checksum' image property which is an md5 hash
of image data content. It's a "legacy" property because it has not been
required for the validation of downloaded image data since glance
version 17.0.0 (Rocky) when the operator-configurable secure "multihash"
was implemented. However, the 'checksum' property has continued to be
populated for backward compatibility. In order to populate the field,
even as a courtesy, an implementation of the md5 algorithm must be
available to glance; but this cannot be guaranteed in environments that
comply with various security standards (for example, FIPS). As a
result, there are environments in which glance cannot be run, and of
course, these are most likely exactly the environments in which people
want to run glance.
To remove the dependency on the insecure MD5 algorithm, glance should
stop populating the legacy 'checksum' field. It has already been made
redundant by the secure "multihash" and is unnecessary. In order to
preserve backward compatibility, the field will not be removed.
As a timeframe for fixing this: an announcement can be made to operators
as part of the Ussuri release, and code using md5 will be removed during
the Victoria development cycle. Thus the Victoria release will not
require Glance to be executed in a non-compliant security environment.
** Affects: glance
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1875439
Title:
glance requires md5 implementation be available
Status in Glance:
New
Bug description:
Glance populates a legacy 'checksum' image property which is an md5
hash of image data content. It's a "legacy" property because it has
not been required for the validation of downloaded image data since
glance version 17.0.0 (Rocky) when the operator-configurable secure
"multihash" was implemented. However, the 'checksum' property has
continued to be populated for backward compatibility. In order to
populate the field, even as a courtesy, an implementation of the md5
algorithm must be available to glance; but this cannot be guaranteed
in environments that comply with various security standards (for
example, FIPS). As a result, there are environments in which glance
cannot be run, and of course, these are most likely exactly the
environments in which people want to run glance.
To remove the dependency on the insecure MD5 algorithm, glance should
stop populating the legacy 'checksum' field. It has already been made
redundant by the secure "multihash" and is unnecessary. In order to
preserve backward compatibility, the field will not be removed.
As a timeframe for fixing this: an announcement can be made to
operators as part of the Ussuri release, and code using md5 will be
removed during the Victoria development cycle. Thus the Victoria
release will not require Glance to be executed in a non-compliant
security environment.
To manage notifications about this bug go to:
https://bugs.launchpad.net/glance/+bug/1875439/+subscriptions
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