GHSA-6qfg-8799-r575
Kubernetes kubectl cp Vulnerable to Symlink Attack
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | k8s.io/kubernetes | >= 1.13.10, < 1.13.11 | 1.13.11 |
| Go | k8s.io/kubernetes | >= 1.14.6, < 1.14.7 | 1.14.7 |
| Go | k8s.io/kubernetes | >= 1.15.3, < 1.16.0 | 1.16.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.
References
External links from the advisory. They lead to third-party sites.