An information exposure vulnerability in Canonical MAAS prior to versions 3.4.10, 3.5.14, 3.6.5, 3.7.3, and 3.8.0 allows an unauthenticated attacker to retrieve the RPC secret in plaintext via the vendor data metadata endpoint. If a target machine was deployed with the 'register as rack' option enabled, an attacker who obtains or infers the machine's system ID can query the preseed/metadata server to leak the secret.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 6
https://bugs.launchpad.net/maas/+bug/2153942
security@ubuntu.com
https://github.com/canonical/maas/commit/3864ef9dca54e36e3d34d18233b87666b8ee1d…
security@ubuntu.com
https://github.com/canonical/maas/commit/65e89c05970f4514f9e6de043c2779017b43ad…
security@ubuntu.com
https://github.com/canonical/maas/commit/8489979d64b0e7f124e7cef66d02b21263918f…
security@ubuntu.com
https://github.com/canonical/maas/commit/a9486ad0cc90f4571142c1bea13f02d1361cb3…
security@ubuntu.com
https://github.com/canonical/maas/commit/ead659f70224538517c80478c3fd8c9e730aae…
security@ubuntu.com