Recover A password


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Special Forums Cybersecurity Recover A password
# 1  
Question

Hello All,
I have an application user (INFORMIX). This is a system user. It runs processes That I am unaware of. I need to discover the user's password. I can't change it, because it will affect the processes it's runnig. Is there a utility that will allow me to 'su' to that user from root and print out the password in plain text?
# 2  
i don't beleive there is a utility to do what you ask. There is a program(s) named crack that will attempt to crack the passwd, but it is an exhaustive password cracker and takes time and may not crack the encryption. Processes already running will not be affected by a passwd change. in fact, informix can be a locked user if the database is started by the rc scripts.
# 3  
Passwords are never decrypted on unix, but rather, a system call is made to a function and the string you enter as the password gets encrypted, and compared to the encrypted password. If they match, you're in. Now, there are password hackers, but they donot decrypt the password file, but rather, encrypt words from a dictionary and try them against every account (by crypting/comparing) until it finds
a match.

as 98_1LE suggest use 'crack' or 'John The Ripper'


# 4  
The UNIX password encryption algorithm is a 'one way' mathematical function. 'One way' means there is encryption, but no decryption possible. As MIB and 98 say, the only way to search for passwords is to encrypt passwords and compare them to the encrypted string.

This is why picking simple dictionary words as passwords is weak, because password cracking programs use an internal dictionary to encrypt and compare.

One way passwords, BTW, has limited long term usefulness. With computing power and storage prices dropping, there will come a time in the near future when it is possible for people to encrypt all possible combinations (with the salt) and query the database directly with the encrypted string. With an 8 token limitation, this is becoming closer to reality each year.
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #125
Difficulty: Easy
UNIX is a certification of a complete OS system, not only a UNIX kernel.
True or False?

10 More Discussions You Might Find Interesting

1. Forum Support Area for Unregistered Users & Account Problems

Unable to recover my password

Hi team, My Member Id is : 'Nila' and I forgot my password. I have tried to recover it from "Forgotten your password" link. But its not accepting my mail id which is valid. (nila.shanthi@gmail.com). Please help me to recover/change my password to login. Regards Vennila (1 Reply)
Discussion started by: Vennila
1 Replies

2. UNIX for Dummies Questions & Answers

How to recover root password on SuSE?

Hi, We forgot the root password on SuSE version 10 server. Since I didn't have SuSE DVD, I started the server using Redhat. I updated /etc/shadow and removed the root password. I then started the server and I still can't login using root. Any idea? One more question, on Novell web... (6 Replies)
Discussion started by: samnyc
6 Replies

3. Red Hat

How to recover the root password?

Hello forum members, Please help me to recover the root password. i can login with the user in redhat linux but i forget root password. so pleas help me to recover. advance thanks siva. (2 Replies)
Discussion started by: workforsiva
2 Replies

4. Solaris

Recover root password

How can I recover root password :wall: 1) I am running Solaris 10 (X86) through VMware for practicing. 2) I was practicing root password recovery and deleted the password in /etc/shadow file. 3) Neither cant login the to the CLI nor Console 4) Selected the Soalris X86 failsafe in... (4 Replies)
Discussion started by: vijaykrishna
4 Replies

5. Solaris

Recover Admin Password

Dear All Users I have two doubts please any one clarify my doubts 1. In solaris As a admin i've forget my password so how could i know whats my password 2. if someone change my password so how could i rectify my password. Please can anyone solve my doubt with clear steps (2 Replies)
Discussion started by: suneelieg
2 Replies

6. Solaris

How to recover Admin password

Dear all I have two doubts please clarify my doubt with clear steps 1. As a admin i forget my password how could i know whats my password. 2. If someone change my password how could i rectify that Please give me reply. with clear steps (0 Replies)
Discussion started by: suneelieg
0 Replies

7. Windows & DOS: Issues & Discussions

How to Recover windows administrator password?

HI, Can anybody tell me..about recovering windows administrator password in case of Forget it. Now in Unix OS and any database,there is a fascility of recovering root/admin password.... Can window provide any such kind of fascility?....Also tell me any other normal users password recovery... (5 Replies)
Discussion started by: jagdish.machhi@
5 Replies

8. Solaris

Need to recover 'root' password

Dear All, I have lost my data backup server's root password, just have a normal login username and password ..but i need to get back my root passwd....any1 can help me out plz :confused: (7 Replies)
Discussion started by: abir
7 Replies

9. Solaris

How to recover root password

How to recover root password in solaris, I forgot root password. thanks in advance (2 Replies)
Discussion started by: durgaprasadr13
2 Replies

10. Solaris

Recover root password

I need to recover root password on a test server (E 10k) running solaris 9. Can someone please tell me how to do this? (1 Reply)
Discussion started by: nitinkgoud
1 Replies

Featured Tech Videos