Ingo Franzki 226728731c libseckey: Protect from symlink-following attacks ...

When creating or writing files, make sure that the file is not a
sysmlink. Such files created by libseckey are typically stored inside
the zkey repository and the owner and mode of them are changed to.
allow read/write for the owner user and the 'zkeyadm' group. It
would allow a symlink-following attack if the file being created are
symlinks. Make sure to open such files with the 'O_NOFOLLOW' flag.

Assisted-by: IBM Bob:2.0.0
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Finn Callies <fcallies@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

2026-07-20 15:25:58 +02:00

29 KiB

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