snap: reject layouts to /lib/{firmware,modules} #6649
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Using a layout on /lib/firmware might allow an application to trick the kernel into loading a firmware blob modified by the attacker. Similar operation may happen in /lib/modules where the kernel may load a module on demand. Signed-off-by: Zygmunt Krynicki <me@zygoon.pl>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Using a layout on /lib/firmware might allow an application to trick the
kernel into loading a firmware blob modified by the attacker. Similar
operation may happen in /lib/modules where the kernel may load a module
on demand.
Signed-off-by: Zygmunt Krynicki me@zygoon.pl