A partial path traversal issue exists within the functions load-file
and load-resource
. These functions can be limited to load files from a list of load paths.
Assuming Venice has been configured with the load paths: [ "/Users/foo/resources" ]
When passing relative paths to these two vulnerable functions everything is fine:
(load-resource "test.png")
=> loads the file "/Users/foo/resources/test.png"
(load-resource "../resources-alt/test.png")
=> rejected, outside the load path
When passing absolute paths to these two vulnerable functions Venice may return files outside the configured load paths:
(load-resource "/Users/foo/resources/test.png")
=> loads the file "/Users/foo/resources/test.png"
(load-resource "/Users/foo/resources-alt/test.png")
=> loads the file "/Users/foo/resources-alt/test.png" !!!
The latter call suffers from the Partial Path Traversal vulnerability.
This issue’s scope is limited to absolute paths whose name prefix matches a load path. E.g. for a load-path "/Users/foo/resources"
, the actor can cause loading a resource also from "/Users/foo/resources-alt"
, but not from "/Users/foo/images"
.
Versions of Venice before and including v1.10.16 are affected by this issue.
Upgrade to Venice >= 1.10.17, if you are on a version < 1.10.17
If you cannot upgrade the library, you can control the functions that can be used in Venice with a sandbox. If it is appropriate, the functions load-file
and load-resource
can be blacklisted in the sandbox.
If you have any questions or comments about this advisory: * Open an issue in GitHub Venice * Email us at juerg.ch
I want to publicly recognize the contribution of Jonathan Leitschuh for reporting this issue.
{ "nvd_published_at": "2022-08-15T11:21:00Z", "github_reviewed_at": "2022-08-18T19:07:58Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-22" ] }