Path traversal in the CLI client image export and copy functionality in Canonical LXD from 4.0.2 before 4.0.14, 5.0.10, 5.21.8, and 6.10 on all platforms allows a remote malicious or machine-in-the-middle image server to overwrite arbitrary local files and execute code on the client system via a crafted Content-Disposition header filename parameter during unified image export or copy operations into a local directory target.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 6
https://github.com/canonical/lxd/pull/18940
security@ubuntu.com
https://github.com/canonical/lxd/pull/18974
security@ubuntu.com
https://github.com/canonical/lxd/pull/18975
security@ubuntu.com
https://github.com/canonical/lxd/pull/18976
security@ubuntu.com
https://github.com/canonical/lxd/pull/18977
security@ubuntu.com
https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq
security@ubuntu.com