Thus, any request to “decrypt” a Type 5 password is technically invalid. The correct approach is (recovery via guessing). 5. Practical Password Recovery Methods 5.1 Offline Cracking (Recommended) Use John the Ripper or Hashcat .
# Save hash in file (cisco.hash) $1$mERr$hP5YqQk5Q6Y9Z9Xj5x5Zz/ hashcat -m 500 -a 0 cisco.hash rockyou.txt Type 5 = mode 500 (MD5 crypt) decrypt cisco password 5
is commonly found in older or moderately secure Cisco configurations (e.g., enable secret ). It is not reversible by design. 3. Technical Specification of Type 5 3.1 Format A Type 5 password in a Cisco config appears as: Thus, any request to “decrypt” a Type 5
| Type | Algorithm | Reversible? | Security | |------|-----------|-------------|----------| | Type 0 | Plaintext | Yes | None | | Type 5 | MD5-based hash | No | Moderate | | Type 7 | Vigenère cipher (obfuscation) | Yes (trivially) | Very weak | | Type 8 | PBKDF2-SHA256 | No | Strong | | Type 9 | SCRYPT | No | Strongest | Practical Password Recovery Methods 5
Thus, any request to “decrypt” a Type 5 password is technically invalid. The correct approach is (recovery via guessing). 5. Practical Password Recovery Methods 5.1 Offline Cracking (Recommended) Use John the Ripper or Hashcat .
# Save hash in file (cisco.hash) $1$mERr$hP5YqQk5Q6Y9Z9Xj5x5Zz/ hashcat -m 500 -a 0 cisco.hash rockyou.txt Type 5 = mode 500 (MD5 crypt)
is commonly found in older or moderately secure Cisco configurations (e.g., enable secret ). It is not reversible by design. 3. Technical Specification of Type 5 3.1 Format A Type 5 password in a Cisco config appears as:
| Type | Algorithm | Reversible? | Security | |------|-----------|-------------|----------| | Type 0 | Plaintext | Yes | None | | Type 5 | MD5-based hash | No | Moderate | | Type 7 | Vigenère cipher (obfuscation) | Yes (trivially) | Very weak | | Type 8 | PBKDF2-SHA256 | No | Strong | | Type 9 | SCRYPT | No | Strongest |