feat: found the exploit in the code and attaced the server

sheet03/a2/a.txt

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+The Code uses unsalted hashes of the passwords.
+That way there is no random data added to the hashes and it is very easy to find identical hashes using
+pre-computed lookup tables.
+
+Using such a tool we found that the password admin123 has the same hash that is stored for the username admin.

sheet03/a2/b.txt

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+07:46:38 leo@group-20 ~ → cat .ssh/config 
+Host chocolate
+  User chocolate
+  Hostname 10.42.23.1
+
+07:46:13 leo@group-20 ~ → ssh chocolate
+chocolate@10.42.23.1's password: chocolate
+Chocolate Factory SCADA Command Line Interface v2.2.144
+
+Please, enter your authentication credentials.
+
+> Username: admin
+> Password: admin123
+
+Welcome admin!
+
+We are currently clean on OPSEC.
+
+Current System Status:
+ 🏭 Production Line 1:               [🟢 ONLINE] - Idle
+ 🏭 Production Line 2:               [🟢 ONLINE] - Running (Secretly Sweet Chocolate Batch #42)
+ 🏭 Ingredient Hopper (Cocoa):       [🟢 ONLINE] - Level: 85%
+ 🏭 Ingredient Hopper (Sugar):       [🟢 ONLINE] - Level: 92%
+ 🏭 Ingredient Hopper (Milk Powder): [🟢 ONLINE] - Level: 78%
+ 🌡️ Temperature Control System:      [🟢 ONLINE] - Target: 45°C (±0.5°C)
+ ⚙️ Mixing Unit A:                   [🟢 ONLINE] - Standby
+ ⚙️ Mixing Unit B:                   [🟢 ONLINE] - Active
+ 🍫 Molding Machine Alpha:           [🟢 ONLINE] - Ready
+ 🍫 Molding Machine Beta:            [🟢 ONLINE] - Processing
+ 🧊 Cooling Tunnel System:           [🟢 ONLINE] - Target: 10°C (±1°C)
+ 📦 Packaging Unit Delta:            [🟢 ONLINE] - Awaiting Output
+ 🤖 Quality Control Bot v3.2:        [🟢 ONLINE] - Monitoring
+ ⚡ Power Supply:                    [🟢 ONLINE] - Stable
+ 🌐 Network Connectivity:            [🟢 ONLINE] - Good
+ 🔒 Security System:                 [🟢 ONLINE] - Active
+----------------------------------------------------
+✅ ALL SYSTEMS GREEN. Chocolate production is nominal. ✅
+
+
+📝 Recipe for 'Secretly Sweet Chocolate Batch #42
+
+  Ingredients:
+
+  1 'Bargain Bin Chocolate Chunk'
+    (obtained from ... questionable sources)
+  3 'Heaping Spoonfuls of Questionable Granules'
+    (definitely not pure sugar)
+  A splash of 'Mysterious Gloss'
+     (something called vasline, maybe inedible,
+      but it makes things shiny!)
+
+
+  Instructions:
+
+  Acquire the Goods:
+     Locate and 'liberate' the cheapest-looking chocolate
+     you can get from the competition.
+  The Melt Down:
+     Subject the 'Bargain Bin Chocolate Chunk' to intense heat.
+     The goal is a questionable, slightly lumpy liquid.
+  Sweeten the Deal:
+     Introduce the 'Heaping Spoonfuls of Questionable Granules'
+     to the melted chocolate. Stir vigorously (or just shake the
+     container violently). The mixture should become alarmingly
+     sweet.
+  The Glossy Finish:
+     Add a dash of 'Mysterious Gloss.' This will give the product
+     an unsettlingly shiny appearance.
+  Mold it (Sort Of):
+     Pour the concoction into a vaguely bar-shaped container (the
+     packaging of the input chocolate might work?).
+  The Pay Off:
+     Pay tons of influencers to advertise this as the best
+     chocolate they have ever tasted, and price this chocolate
+     at a ridiculous high price!!1! 🤑💰💸
+  
+Connection to 10.42.23.1 closed.